OK, so the basic non-fight component of a conflict is this: take a swing, beat a 4, if successful, the other guy is taken out.

(I like “taken out” as a euphemism because it underscores that all ways of taking someone out of a fight are roughly equal – unconsciousness, death, getting tossed overboard and the like all fall into the same bucket, and it leaves the exact color and fiction flexible. It also leaves a hook in place later to allow players to offer their own taken out outcomes if you want to avoid death in interesting ways, but that’s a matter to think about later.)

Once we’re in an actual fight, we don’t want things to be quite so quick as all that, but we still want to respect the 4+ success rule. We could go for a numeric system (hit points or the like) but let’s think of this in terms of statuses – we have this idea that a good enough roll can result in being taken out, what else might happen as a result of a roll?

Suppose that there are two other results – inconvenienced and harmed. Inconvenienced means that the other side has gotten some transitory advantage – they’ve knocked you back, rung your bell, seized the high ground or whatever. Harm is more palpable – it’s a disarm, an injury or some other major setback. And, of course, the third result (taken out) has already been recovered.

So, at their baseline, let’s map these as follows:

4 – Inconvenience
7 – Harm
13 – Taken Out

Now, that maps to our difficulties, but it raises some immediate questions. Does it mean that you need at least a 3d pool to be able to win a fight? And what happens when two people of high skill go at each other? Do they both just die? Obviously, we need to address these issues.

Now, the first is pretty straightforward, and we’ll do something that has been done in many other systems and just have damage “roll up”. That is to say, if you inconvenience someone who is already inconvenienced, they are now harmed. If you inconvenience someone who is already harmed and inconvenienced, then they’re taken out. Pretty simple. It allows high skills to get decisive results while allowing unskilled combatants to have sloppy, ugly fights that end badly.

Still brutal, though, especially since there’s no idea of defense. Skill won’t keep you standing any longer, and that’s problematic.

The fix for this is tied into how I view the statuses. Note that it would be normal to put a checkbox next to each status an fill them in over the course of a fight, but that’s more static than I like. I actually don’t want them to be static, I want them to come and go – not just inconveniences (which are already often tenuous in games like Fate) but harm and maybe even taken out. This means that, at a high level, I want people to be able to improve their status as they play, so that’s another axis of action. Sometimes it will be a dull axis (shrugging off an injury) and sometimes it’ll be flashy (getting out of a tight corner) but the bottom line is that status can fluctuate over the course of a fight.

(Saying that, my gut is suggesting we need a 4th status, just so there’s more room for things to slide. That may be true, but I’ll sideline that concern for now. If I figure out a good mechanic for this, then one good test for it will be expanding the status list).

So how should we implement this? My first thought is to make it something you can spend extra dice on (that is, for those who don’t recall, dice that weren’t needed to hit the target number). This has an interesting upshot because it provides a double incentive to go for inconveniences and harm rather than KO’s, because you’re more likely to have extra dice left, at least in theory. Of course, the fact that hitting three “4s” may be easier than hitting one 13 may also play into that. This also provides an interesting tool for NPC behavior, since the target number an NPC aims for speaks directly to their tactics, and can be a solid part of an NPC writeup.

Anyway, at the simplest you could just say that 1 extra die can reduce things by one “step”, so a hurt can become an inconvenience for 1 die, or go away entirely for 2 dice. That’s a good baseline, but it might be too easy. This is something to test, but I’d absolutely want to fiddle with different costs, including a higher base (say, 2 dice per step), or a sliding scale (1 for inconvenience, 2 for harm, 3 for taken out if apt – or perhaps the reverse!) but the idea is solid. It just leaves two real questions – how it interacts with a taken out result, and how it sequences. Those are pretty fiddly bits, so they’re best left for tomorrow.

All the previous discussion about fights also implies something that I figure I’ll state outright – writing a generic combat system is a much bigger pain in the ass than writing one for a genre. So much so that most generic combat systems aren’t – they are in fact implicit declarations of genre through the simple fact of how they handle things like survivability, “realism” and such.

Not to say they are unaware of this. Most provide a baseline with the expectation that it can be tweaked to handle other genre expectations (provided the game acknowledges genre expectations in the first place), but they need a starting point. So with that in mind, let’s establish one.

My personal burden is that the two poles I am drawn towards in RPG combat are strongly opposed. The first is Swashbuckling, which is a bit over the top, but not as much so as Hong Kong action or Anime. The second is Rolemaster, where violence is dangerous and risky and always to be taken seriously. Those two things are hard to combine, but ideally we can pull off some sort of vinaigrette sort of emulsion.

This means the first thing to look at is stunting. This is sort of a broad question best phrased as “how tolerant is the system of players doing cool stuff that might be unrealistic or tactically inappropriate but which looks awesome?” This is a kind of important question because, practically speaking, swinging from a chandelier is a pretty awkward way to make an attack, but it looks pretty cool, so how should a game handle it?

The first option is the strict realism school, which would impose a penalty to the attack based on the difficulty of it, maybe call for an athletics roll to pull it off, and otherwise frown and tut-tut at the idea. In short, everything in the system would suggest that this is a terrible idea, and one you really shouldn’t pursue unless absolutely necessary.

There’s also a loose realism school which is not necessarily going to penalize such an attack so much as make it non-optimal. It might offer some small benefit (such as allowing the attack to be made with an athletics skill) for a serious tradeoff (you do unarmed damage, which probably sucks). This is something you can do, but it’s rarely going to be the optimal thing to do.

At the far opposite end, you have the true stunting school (names thus for it’s use in Exalted) where the character gets a _bonus_ on the attack based on how awesome it is, thus making colorful attacks desirable. This can get a little silly as players ham it up to get the bonuses, but it definitely supports the flashy.

Between those, there’s a broad band of cinematic styles, ranging from abstract cinematic (like 4e’s stunts, where the mechanical effects are sufficiently disconnected from the fiction to allow a lot of narrative flexibility within fairly strict mechanical interpretation. Also applies to many scene-based resolution games) to gritty cinematic (as in Feng Shui, where stunts are penalized, but that penalty is very small and bonuses are very high, which allows them but discourages their constant use).

This cinematic space is probably where I want to aim for, which is definitely on the swashbuckling end of things, but it highlights a few things. My real goal is the 1970’s Three Musketeers movies, where fights have flair (and even humor), but also have a sense of danger to them despite reasonably limited bloodshed. That means I’m not looking for Hong King musketeers – it sucks in film and it’s not what I want in a fight.

Part of this is tied to the cultural role of violence and death. It’s important to remember that while we remember the duels and swordplay in the Three Musketeers, that was criminal activity. Duels are illegal because people killing each other is a terrible thing. It’s a sin and a crime, and while you might try to outright murder the other guy on the battlefield or in certain brutal circumstances, those are edge cases. Or should be. The problem is that in any modern game, you can be certain that a player wants to be Wolverine (or the like), and such things quickly move towards the least common denominator. That’s rough.

And with that, I find myself wrestling again. Is there a meaningful way to address the role of conflict in the game outside of the conflict rules? Setting design can speak to it certainly, but there’s a reasonable case that they can be quite toothless in the face of a setting that says one thing and rules that say another.

Argh. Ok, I clearly need to just write some rules, then worry about this issues _after_ I do so. Doing so beforehand is proving utterly paralyzing.

At first glance, it can seem like the question to ask yourself when designing a combat system is “How can we have everyone kill each other?” This is certainly an important question, but I think the real question is quite the reverse. That is, “How can we keep people from killing each other?”

Why? Ok, consider most any other action in an RPG or story. You want to lift a rock? Maybe roll some dice and you lift the rock. Ditto for climbing a rope, charming a barmaid or anything else. But when the action is “Stick my sword in that guy” we’re uncomfortable with it being that straightforward, and when it comes to the other guy trying to stick his sword in us, then we definitely don’t want it to be that simple.

So with that in mind, the real purpose of the combat system is to make the process of killing someone take enough time and effort to complicate matters without making things un-fun. That is, I admit, a kind of callous and disturbing take on it, but the role of violence in RPGs is a bit of a messy topic (and one I’m not really going to drill into at the moment).

On the “not making thing un-fun” front, many systems put a subtle (or not-so-subtle) thumb on the scales in support of the idea that the PCs are going to win any fight they engage in, albeit at some cost. This is a tricky balancing act because we instinctively want a “Fair fight” but we also want a fight we can win. This is the sports movie paradox, and it pops its head up in RPG design in a lot of odd places. This is a big issue, but it’s also a high level one, which makes it hard to address at this point.

In terms of complicating violence, the trick is that the heart of a combat system is not dealing damage, it’s damage mitigation. Not that dealing damage in unimportant, but rather it’s simple and straightforward, and if that’s all there was to it, then combat would just be back to the straightforward “I put my sword in his gut”. Mitigation is all the reasons that you can’t put your sword in his gut, or that it doesn’t end the fight when you do.

Classically, this divides into two things – defense and resistance – though that is a division born out of tradition more than necessity. Defense is all the reasons why something wouldn’t hit you (that is to say, have no subsequent mechanical effect) while resistance is all the reasons that a hit doesn’t end the fight (such as damage reduction or hit points). This sounds tidy, but historically it’s very muddled. Consider the role of armor – is it a function of defense or resistance? You can make a case for both (and, indeed, in some systems it has elements of both) and in doing so you highlight the division.

There’s a reason that this model lines up with a similar two-part model for offense – roll to attack + roll to damage. They’re opposite sides of the same coin, and a lot of games have streamlined both of these things into a single roll to hit, with damage based on Margin of Success plus some modifier (such as weapon or strength). This is certainly easy, but it tends to encounter predictable problems. Specifically, it tends to make whatever stat covers accuracy into a super-stat, and it does weird things when dealing with weapons at extremes of the damage range (since it can make “0 damage” weapons, like a ping pong ball, lethal).

Unfortunately, the alternate approach of adding more layers of rolls (say, one for attack, one for penetration and one for damage) gets cumbersome quickly, so it’s not a solution either. Practically speaking, we’re limited to a small number of rolls for an exchange in combat, but at the same time we want it to be more than just a single exchange. So where does this leave us?

Well, let’s look at what we have for dice. Right now, our core idea is that a normal success is easy to achieve, and there’s not much that’s more normal than whacking someone. This means we’ve got a default assumption that it’s pretty easy to hit someone, and I’m ok with that, because it is. And that, right there, speaks to something of a design goal – the purpose of every swing in a fight is to end the fight, so there needs to be a good reason it doesn’t.

Having a goal like that is essential to making a combat system do something other than emulate another combat system you’re familiar with. That specific idea is a somewhat brutal design goal, and it won’t stand on its own, but it’s a great start, and it gives us something to build from for the next time.

Ok, back on track. Time to think about conflict. Now, the reality is that if you’re designing a game, conflict really means combat. Yes, absolutely, you might need to handle other types of conflict, but combat is the starting point. This is partly because it’s such a central part of the hobby, but it’s more because if your system is going to break, this is where it’s going to happen. That sounds negative, so let me put it a little bit differently – no other part of a game system requires you to think about what the game will actually be like and how that interacts with expectations than combat.

That’s a pretty loaded statement, so let me unpack it a bit into the four things that make combat a pain in the ass.

First, because combat tends to have explicit stakes (character well-being) that are measurable outside of the fiction (stats and information on the character sheet) its impact is directly observable in action. That is, while there may be some narrative interpretation applied to how 7 hit points got lost, it’s still 7 hit points getting lost. This is not necessarily true of every system out there, but it’s common enough to be a default.

Second, there’s a huge range in expectations regarding how combat should go, so much so that it’s one of the main yardsticks for judging genre. Games might have lethal, brutal combat, or they might have fast and loose, mostly harmless combat. Or they might have something in between. Whatever the case, the usual yardstick is that there is usually a specific look and feel the designer is going for, often epitomized by a particular book, movie or TV show though sometimes through their own personal lens of how fights work “in real life”.

Third, fiction (both on-screen and in-mind) has the benefit of narrative protection for heroes, allowing an author to tell a tale of brutal, unforgiving violence without accidentally losing characters. A designer who seeks to emulate that may quickly discover that brutal and unforgiving cuts both ways. This can be addressed by effectively having different rules for players and everyone else (4E and many video games do this well) but that introduces a lot extra overhead into the system.

Last, we’ve got decades of training from D&D that have totally shaped our perspective. This is not a sleight to D&D but rather an assertion of its huge mindshare, as can easily be seen in most RPGs and computer games. And not just CRPGs – there are precious few shooters out there that don’t have some form of hit points, and there’s a good reason for that. If play is fun, then dying (and thus not playing) probably isn’t. On the upside, this simple model has supported a lot of fun play, but it also means that the assumptions that might guide you in other parts of game design may fail you here. The blatant gamey-ness of combat does not stick out to people the same way it would in other parts of the game, and in fact if you move away from the established standards, people start reacting badly because they know how things should be.

Now, these are concerns, but not show-stoppers. But they’re important to keep in mind as we move into designing conflicts.

Ok, so we now have a basic die mechanic (a tally system for dice pools ranging from 1d6 to maybe 5d6) and a basic method for establishing difficulties (numeric steps 4/7/13/19 based on expertise required to perform a task) and a methodology for handling success. That’s a good start, but for all the thinking that went into it, there’s not much there. In the absence of further details, this is just one more d6 system looking for an answer to the question of “Why not just use RISUS?”

First off, let me state that RISUS is a good answer to many questions, and if the sole purpose of this were to create a not-RISUS, that would be a little lame. There is a lot of desire in RPGS to differentiate purely for the sake of differentiation (or, more cynically, to make something different enough that you can put your name on it) so beware that particular lure.

Thankfully, I have enough things I want the system to accomplish that we still have some very organic work to do. Let’s start looking at the bells and whistles.

When looking to add fiddly bits to a system, its worth thinking about when in the process you want things to happen. Are you going to introduce choices before the dice roll or afterwards? Or both? This gets further complicated when you have more than one roll (such as D&D’s attack & damage) but let’s not borrow trouble. We’ll assume a single roll for the time being.

When making this decision it’s worth realizing that there’s more than just timing at work. Choices made before the roll have a very different texture than those made afterwards, and the difference revolves around the certainty of the outcome. Any choice made before the roll is, practically, a gamble. It’s a choice being made on the hope that the subsequent roll will succeed. This has the benefit of being more engaging and the drawback of risking paralysis – it’s easy to get hung up on what would be the “right” choice.

In contrast, choices made after the roll are very certain, and tend to be all about working with the outcome. In addition to being simpler, these choices usually are much easier to ingrate into the fiction of play. That is, characters don’t use their big attack to miss – they hit, then decide it’s going to be a big hit. For some people that logic is jarring, especially if the game has enough missing that it’s expected, but other players find the other disconnect jarring.

So, let’s say we want a before-the-roll mechanic. We probably want to embrace the gambling element of it, allowing the player to take on some risk before the roll in return for a potential reward. The easiest way to do this with the system so far is to play around with the trickle-down nature of success. Under normal circumstances, even if you don’t hit the target you’re going for, you still succeed to a lesser extent. You could offer a bonus on the outcome provided that failure will be absolute.

That feels a little awkward, and there are simpler alternatives. Bonus Dice, for example, are a common trick for rounding out dice pool systems. That is to say, you may get to roll extra dice, but only count the best ones. These might be true bonuses (Like in PDQ# or Over the Edge), fixed result pools (like Cortex+ always keeping the best two dice) or roll & keep systems (like L5R).

This is a pretty robust system, and has the advantage of keeping the results within the bounds of the original die pool. It’s worth keeping in mind, but it’s also well worn territory. I’ll keep it in mind, but I’m not particularly inspired. With that in mind, I’m switching the focus to an idea for an after-the-roll bonus.

A while back, a very clever game called Secret of Zir’an failed as a result of a terrible printing failure. One of the more fun ideas it included was a very robust system for using the Margin of Success on a roll for mechanical purposes. That is, if you needed a 20 and rolled a 25, you might spend 2 points to do extra damage and 3 points to knock your opponent over. Neat little mechanic, and one I’d love to capture it.

The problem is that margin of success math is a pain in the ass. Adding up a bunch of dice is enough of a barrier – adding a second equation to the mix is just a bad idea, so the trick is to find a way to make that simple.

With that in mind, we’ll try a trick that steals a page from the idea of bonus dice, but keeps the focus on the margin of success. The player may “keep” however many dice he needs to make the roll – if there are dice left over, then those can be spent as currency. It doesn’t matter what the values on the extra dice are – the dice themselves are currency.

For example – let’s say you’re rolling 4d6 trying to hit a 7. You roll 2, 2, 3, 4. You can build the 7 out of the 3 and 4, with 2 dice leftover. Those two extra dice can be spent for extra effects (akin to Dragon Age’s stunt points). I don’t yet know what the points will be spent _on_, but I think that gives enough of a starting point to start hanging some bits off of.

Now, it’s important to remember that these bonuses need to be tangential, not additive. That is, no number of bonuses should be able to turn a 4 result into a 7, which means the bonuses don’t make the result _better_, they add additional elements to it. In the most broadly narrative sense, each bonus might be used to declare a fact of some sort. This is a fuzzy distinction, but it gets concrete when you start building specific rules – it’s easy to look at any specific bonus and compare it to what a higher roll would have done, and see if there’s any overlap.

Curiously, this little test also sheds a lot of light on what needs to be thought about in a conflict system, so we’ll probably head that way next.

Looking at last weeks post, math-oriented folks have probably noticed the diminishing likelihood of failure as die pools increase. Since the absolute worst you can roll is all 1s, once you have 4 dice, you’re guaranteed success. Some people might look at this as a bug and propose an easy fix, like “All 1’s is a fumble”, but I think understanding it requires looking at how the system handles failure.

In this case, I’m against it. Failure, that is.

This is not just a competence-porn issue, it’s part of how things stay fun and interesting. This is not to say failure can’t be interesting – it absolutely can – but it’s rarely interesting all by itself. Failure is interesting because of the complications it introduces into the situation, and I’m all for skipping the middleman and jumping right to the complications. That is to say, if the dice come up short of the target, then it becomes a choice – would the player prefer to fail, or would he like to succeed with some complication or consequence offered by the GM.

This is easy to apply to basic difficulties (4), but how does it apply to higher levels of difficulty. Can a character take on enough consequences to successfully perform brain surgery?

Obviously, that’s pretty nonsensical, so the rule of thumb is that consequences can improve the outcome by a single step, and only if there’s a reasonable narrative for it (the player can male proposals if he likes). Depending on the scope of the activity, the task might be resolved in some way other than the initial skill rolled if that makes sense to the consequence. For example, if you need a computer program(7) but only roll a 5, then you might get a success by:

• Having someone else do it, in return for incurring a substantial (and immediate) debt to them. The program might even be held hostage for you holding up your end.
• You spend all night copy and pasting scripts from websites and you get you program, but your computer is now totally compromised by the various viruses to downloaded in the process.

None of that would help if your goal had been to design a circuit board(13), because that’s a 2 step jump.

Having decided when and how failure happens, it’s important to also talk a little bit about what failure means. Specifically, some thought needs to go into how re-trying works, and what the impact of failure is. In situations where the situation provides clear context for failure then that’s easy, but the situation is not always clear. Looking at the circuit board example, that seems like a task with a very soft failure scenario. If you don’t successfully design the circuit board, then why not just try again?

My thought is that if the task is one where the character can keep rolling til it works, then you’re not rolling to see if ti works, you’re just rolling to see how long it’s going to take. That’s reasonable, but only if time matters in the context of the game, which it often does not. But if everyone’s cool with that being the case, then no problem.

However, some rolls don’t invite that. There are situation where you want failure to stick, in which case failure is a demand for following a different course of action, mechanically handled by trying a different skill or by changing (perhaps improving) the situation enough to merit a re-roll.

With that in mind, the trick will be to communicate clearly to players whether they’re facing a soft or hard failure. In the case of a soft failure, success is inevitable, and the roll is a shorthand for how many rolls its going to take (see the note on duration, above). In the case of a hard failure, there will be consequences of failure, and either the effort cannot be simply re-retried (or if it can, consequences stack).

So, with that in mind we know how to roll, how to judge difficulty and how to handle failure. That covers the basics. Now it’s time to put some spin on it.

Ok, so yesterday we established that we’d be looking at a d6 tally system with a baseline difficulty of 4. We want to expand on that so as to better handle a die pool of up to ~5d6. Given that, there are two different vectors of approach here. The first is the purely mechanical, while the second is conceptual, speaking to the role of numbers. They weave together, so let’s five in from one direction and see what comes of it.

First, we’ll start with numbers. Now, one great thing about d6 systems is that the numbers are pretty well known, and there are decades of games trying to come up with interesting fixes to smooth out the progression of the average roll, since that troublesome 0.5 makes life complicated. These decades are part of why, as I noted yesterday, 4 is such a magical number. And the good news is, there are a few other magical numbers.

The first candidate is 7. 7 is a great number for two reasons. First, it’s the likeliest outcome of a 2d6 roll, and second, it’s the first roll that’s outside of the possible scope of a 1d6 roll. That latter is handy because it provides a fantastic model for something that may not be hugely difficult, but which requires training to be able to accomplish. For example, even if you know how to use a computer (1d6) you don’t necessarily know how to write even a simple program. That requires specific knowledge and training – you’re not just going to “get lucky” if you keep trying. That’s exactly the kind of scenario where a difficulty of 7 is a handy tool.

After that, the next magic number depends on how you look at things. 13 has many of the same benefits of a 7, except that you need at least 3d6 to hope to hit it. The difference is that it’s a bit less likely to succeed – 13 on a 3d6 is harder to hit than a 7 on 2d6. Now, this might suggest a compromise middle step of 10, since that’s a midpoint on 3d6, and it’s +3 from 7 and -3 from 13, and given that 7 is 4+3, and 4 is 1+3 (1 being guaranteed success), there’s some numerical elegance in making the progression 4,7,10,13 (especially because it can be expressed as “base difficulty of 4, with quality of success increasing by one ‘step’ for every extra 3”, something similar to what’s done in a few other dice pool systems).

The problem is there’s some conceptual roughness to it. I mean, yes, I could easily say:
4 – Mundane
7 – Difficult
10 – Complex
13 – Boggling
or something equally pithy and it would still be better than a lot of games (which set their baseline too high) but really it would be utter bullshit. Those terms are crazily subjective, and while I don’t object to the GM interpreting situations, they provide the GM no practical guidelines for how those things are actually set, which would be irresponsible of me.

But if we drop the 10 we get something that’s not quite as intuitive a progression, but is one that gives us a real, concrete basis for the progression: the numbers are such that if you are not at least operating at a certain skill level, you can’t hit them. That means 4,7,13 (and 19, if we really feel it’s necessary).

Now, what those things will mean are going to vary depending a lot upon the specifics of the skills, and when this ends up in a system, some of that is going to have to be offloaded, but the basic progression is pretty simple.
4 – Normal. The difficulty for day to tay tasks that might be difficult, but require only familiarity with the action being accomplished. For example: Disinfect a cut, perform the Heimlich maneuver.
7 – Expert. Difficulty for a task which cannot be accomplished without at least some proper training and experience. For example: Perform more advanced first aid (proper splints & bandages) or give CPR.
13 – Master. Difficulty for a task which requires intense, specialized training. Example: Perform Surgery, prescribe drugs.
19 – Past-master. Perform a hyper-specialized task. For Example: some sort of specialized medicine, like brain surgery or the like.

All of which is to say, the difficulty levels are built on a clear understanding of “Do Not Try This At Home”. If this is something that anyone with a little familiarity could do with luck or hard work, then difficulty is 4.

Now, I should note that I view success as trickling down. If you hit a 7, you also implicitly hit a 4, which may suggest certain bonus or not, depending on the task. If you are doing neurosurgery (19) and roll a 17, then the failure is in the specialized part of the activity. In contrast, if you rolled a 12 (lower than needed for less complex surgery) then the problem was with the surgery as a whole. You get a lot of meaning trickling down through the tiers.

Also, doing this implicitly folds in duration of activity. Climbing a mountain is a task anyone could conceivably accomplish(4). Climbing a mountain in an afternoon probably requires training and experience(7). If you roll to climb the mountain and roll a 6, you still successfully climb the mountain (you beat a 4) but it’s going to take you longer than an afternoon (since you didn’t hit the 7).

Now, this is still just a starting point. We still haven’t added in fiddly bits, and we haven’t subjected it to the real test – a conflict system – but this seems like a solid start.

As I step into creating a die system, lets run through a few things I like and dislike, since these things will obviously impact the final product.

1. I want a reliable/predictable measure of the dice to be rolled. Anyone who has read this blog knows I love Cortex+, but my big complaint with it is that I need to pack _all_ my dice to play. Not because a given roll will use them all, but because I have no useful way to predict which dice I’m going to need in what numbers. This may be a small and petty thing, but there’s a practical underpinning to it.

2. Next, I want to use d6s. There are some practical underpinning to this – they’re ubiquitous and familiar – but it’s also strongly aesthetic. I own lots of cool looking d6s that beg to be used.

3. I want the difference between skill levels (or whatever they end up being) to feel substantial, and I do not need more than 5 or 6 tiers of capability. This is a cinematic/fiction driven sensibility based on the fact that such broad distinctions make for solid character shorthands and are easily recognizable.

Up til #3, all of the options were on the table, but that last step there is going to make a count system problematic. Count systems may have very coarsely grained outcomes (based on number of successes) but the actual die pools tend to progress smoothly, with only moderate differences between pool sizes, especially at high levels. I could work around this limitation with something too-clever, but that seems like a peg-hole problem.

A flat system is still technically in contention, though it would probably require stepped bonuses. For example, my cold was game handles this by making skill bonuses (on a 3d6 roll) +2, +4 and +6. Those are a little close (they work better for Fudge) but the idea of stepped bonuses is not entirely off the table.

The tally system seems like the best contender, something in the Risus/Over The Edge/WEG space, with 5 levels ranging from 1d6 to 5d6 or something similar. Historically I might try starting from a baseline of 2d6 so there’s a “step down” option and there’s at least a little curve in the default roll, but I’m less attached to that idea than I have been in the past.

Now, there’s still nothing concrete to make a decision on, and this can be pretty paralyzing. Almost any choice can be made to work, so what do you do?

Simple: You do -something-. I’m going to go with a tally system because as cognizant as I am of it’s flaws, I’m even more aware of the dangers of sitting here waffling. So with that in mind, let’s see what we can do with a stack of d6s.

The first thing to do is to consider difficulties. I immediately rule out contested rolls because the last thing a tally system needs is more math, so that means fixed difficulties. Since I’m starting from 1d6 I think that means I’m going to pick the classic baseline of 4.

You see 4 show up in a lot of games. It’s a pretty convenient number for a bunch of reasons. On a straight d6 roll, 4+ means a 50% chance of success, and on a 2d6 scale it’s close enough to 75% to be reliable. On a range of die sizes it’s a number that can potentially be hit by a die of any size. All of which is to say that if you’re thinking going with 4 is a ripoff of anything, realize there’s a reason for its ubiquity.

Now, this raises an interesting question: if I’m allowing 5d6 to be rolled, is a base difficulty of 4 even faintly scalable? Certainly, the apex die pools should be reasonably rare, but that’s not any kind of excuse – a known, rare problem is still a problem. Thankfully, I have an instinct that makes this a little less problematic: I’m looking for success to be the expectation. Someone with 1d6 might have some trouble, and 2d6 still has some risk, but by the time you hit 3d6 it’s very nearly a sure thing.

That said, no reason to just leave it at that. Binary success is a little dull because it offers little differentiation between activities. Teaching high school physics ends up on par with crafting the theory of relativity. So that suggests to me that adding additional tiers of difficulty is the best solution.

The problem is that difficulty steps tend to be applied very arbitrary in play. Climbing this hill is this hard, but climbing that hill is that hard and so on. I want them to mean something a little more self-evident. And that, I think, is where I’ll pick it up tomorrow.

Dice systems are, at their heart, kind of dull. This is probably a good thing, since most of the difference between systems can be built upon their framework, so you want them to be simple, reliable and dull. This is on my mind for reasons that are probably a different post, but I’ve been chewing on a core dice mechanic.

Right off the bat you have three big camps of dice mechanic. You have the flat roll, the tally, and the count. Flat roll is most famous in the various incarnations of D&D, which has used it as both roll vs. moving target (old D&D THAC0 tables) or roll + bonus vs target (4e). The “flat” roll may actually have a curve (as in the case of Dragon Age’s 3d6) but it’s always the same dice, and differentiations in skill are represented by changing the target number or changing the bonus. Fudge dice are another weird example of a flat roll that don’t necessarily look it because the range is wacky (-4 to 4) but it’s a fixed set of dice all the same.

Tally systems, such as those used in WEG’s Star Wars or AEG’s Roll & Keep system, are based on totaling up a variable number of dice. Variations in skill can change the size of the die pool, and while there may be some extra mechanical fiddliness in terms of how many dice are counted (as in the Case with Cortex+ or any game with bonus dice) , the core idea is that the pool of dice is the variable and as a subsidiary idea, the size of the dice may also be a variable.

Count systems are usually considered success counting systems, like Storytelling or Burning Wheel. You roll some pool of dice (of variable size, like a tally), but rather than add up the dice, you count the number of results that hit some particular criteria (such as 7+ on a d10, or 4+ on a d6). Left purely in that form, this is just a highly specialized tally system (effectively the dice have some number of 0’s and some number of 1’s) but it’s worth differentiation from the tally because the ways it establishes differentiation can include changing the rules of success counting. For example, successes might usually be on a 7+, but in this particular area in which you excel, they might happen on a 6+. Thus, while the size of the die pool may be one axis, another will often include the means of determining successes.

There’s a lot more fiddly in this. You can add bonuses to a Tally system to make it feel a little more flat-like. In any system, you can add variations in how you measure success and how you handle things like critical successes and failures (all to say nothing of rich rolling). You can get into wacky hybrids or edge cases (like set building), but those three models really cover the bulk of approaches, and they have different strengths and weaknesses.

Flat rolls are the simplest. Even when they require some math, it is usually quite simple, and perhaps more importantly it’s _perceived_ as simple. Reading the die results in a flat roll is easy, with almost no learning curve. Even if the “post-processing” of adding bonuses or the like takes soem effort, it is -after- the roll, a critical point of distinction.

Tally rolls are probably the most robust. If you want to hang a million different mechanics off a roll, or make the die rolling a bit of a game in its own right (like rolling lots of dice, then doing many mini-resolutions from the pool) then this is probably the approach to take, but it absolutely runs the risk of daunting players. Even if you don’t do a lot of fiddly stuff, the perception is that math is hard and slow, and tallying up the dice creates that sense of friction. This can be mitigated with small or familiar dice pools, but it’s always the specter over the system.

Counts are something of a compromise. They offer much of the same mechanical robustness of Tallies, but they promise greater simplicity than doing math, and in my mind they deliver on that, at least to an extent. There can be a little bit more of a curve in picking up a count game, but the act of reading the dice is an educational one, and most people get much faster at it with only a little practice. Unfortunately, there are some problems that come with that. First, that simplicity is based on the method of counting remaining the same, and if the system leans on changes to that, it slows things down. Also, you can only rely on the simplicity scaling so far – if the dice pools get huge (like, Exalted huge) then it will still bog down.

All three methods can work very well. Even more, all three are robust enough that if there’s some particular element you want to accentuate or avoid then you can easily tweak them to that end.

I’m dwelling on this because I have a dice system in mind for a project, and i want to step back and consider its weaknesses and strengths before I totally buy into it. More on that tomorrow.