Game Design Journal 2026-03-08

(The Poetry of Constraints)

An ogre just stepped into the doorway zone. Zhentir, the wonderful but weak wizard, has three Mana left, but they can sacrifice Hit Points to power a Fireball… or a Healing spell… but not both. Grask the warrior is bleeding out behind the barricade. Your scout, Nigini, is two zones away with a loaded crossbow and a prayer. It’s the top of the round. Everyone picks up their initiative D20.

Ya get one action.

The entire table is talking at once. Zhentir’s player is saying, “I’ve got a decent shot at heal Grask if I go Slow. But if the ogre swings first, Grask is toast. I could go in Fast and pop off the healing first, but my Miracles skill is bad, and I’d have to roll with Disadvantage…” “Or I’ll Defend him, I’ll go in the Fast phase…” “If you Defend him you can’t attack—” “I KNOW, but if nobody covers him he’s dead—” “What if I put an arrow into the ogre from here? Two zones away, so Disadvantage—” “Do it, and I’ll go Slow for the Fireball—” “With THREE Mana?” “I’ll move one zone closer, but crud, then he gets a free shot at me…”

After that, when they’ve decided, initiative dice hit the trays. No one knows what the order will be. Everyone’s making a bet.

That conversation, right there, is the game. Everything I designed in CRAWL!‘s combat system exists to produce that three minutes of intense coordination before a single die lands. Sure, what’s happening in the game - the fiction - is generating tension. But in CRAWL! there’s a secondary source: the constraints, which oblige you to solve the combat problem in certain ways.

One Action

Most tactical RPGs constrain WHAT you can do. Feats and action economies parcel your turn into movement, standard actions, bonus actions, reactions, free actions, legendary actions. The optimization game becomes: how many sub-actions can I cram into a single turn? D&D 5E players build characters around maximizing the action economy, stacking bonus action attacks with reactions with movement with Action Surge. The character sheet is a puzzle to be solved before you sit down at the table.

CRAWL! gives you one action.

That’s it. One. Attack, cast, move, defend, trigger, flee, assess, second wind. Pick one. The menu is wide open. There is almost no constraint on what you can do.

If you attack, you cannot defend. If you Parry or Dodge a hit, that was your action; you don’t get to swing back. The game never says “you can’t Parry.” You can always Parry. It costs your turn.

So before anything else happens, before initiative, before phase selection, before anyone rolls a damn thing, every player is already sitting with a tough question: do I act, or do I hold in case something tries to kill me?

You’re gambling. With incomplete information. Because you don’t know when the monsters go yet.

Two Trays

Now layer on the Initiative phase system.

CRAWL! splits each round into a Fast phase and a Slow phase. At the table, there are two physical zones: trays, boxes, taped-off sections of table, whatever you’ve got. At the top of every round, everyone picks up their d20 and throws it into one of the two trays. Simultaneously. Where it lands is your phase. The number showing is your initiative rank. No take-backs. (Also if you miss the tray, you lose your turn!)

Fast phase resolves first. Ranged attacks, movement between zones, quick actions. You can melee in Fast. You can cast spells in Fast. But both of those are at Disadvantage. Fast is the phase of urgency and sacrifice: you go first, but you probably won’t be as effective.

Slow phase is where melee and magic live at full strength. If you want to swing a sword or cast a Fireball without penalty, you gotta wait until Fast is done.

The tray is a commitment mechanism which front-loads deciding WHAT you’re going to do and WHEN (and therefore, HOW effective you’ll likely be). You’re declaring your risk posture with a physical gesture, simultaneously with everyone else, before you know how the round will unfold. The wizard who goes Fast to Heal Grask might watch the ogre act in Slow and flatten someone else entirely. The Scout who goes Slow for the clean shot might watch the goblins swarm in Fast phase before she can loose an arrow.

You chose. You committed. The tray is the contract.

And because initiative resets every round (re-coordinate, re-commit, re-roll and hope), the board scrambles before every commitment. The goblin you outpaced last round might stab first this round. There is no “I won initiative” in CRAWL!. There is “I won initiative this time.”

Defending

In that gap between the one-action economy and the two-phase system, Defend finds its teeth.

Declare Defend in the Fast phase. Your whole round is gone. You do nothing but brace. In exchange, your Parry or Dodge rolls get Advantage. And you can extend that protection to one other character in your zone.

The Warrior standing in the doorway zone declares Defend, names the bleeding wizard behind her, and now any attack on either of them this round meets Advantage on the defensive roll.

This is a combat action that is entirely about someone else. You surrender your agency, your one precious action, to keep another person alive. The phase system gives it weight because you have to commit Fast, before you know whether the protection will even matter. Maybe nobody attacks. Maybe the ogre targets someone in a different zone. You burned your round on a bet.

That bet is the player skill. Reading the board and the monsters, then deciding: this is the round to shield instead of strike. No character build gives you that, no feat, no splatbook, no nine millionth post on optimizing. Just a human being at a table, sizing up a bad situation and betting that their sacrifice will matter.

Zones

All of this needs a place to happen. CRAWL! uses zones.

Many games use zones, I didn’t invent them. But they’re really quite remarkable.

A zone is a space where being there instead of being somewhere else makes a difference. The doorway is a zone because it’s a chokepoint. Behind the barricade is a zone because it’s cover. The ledge is a zone because it gives you elevation and escape from melee. The corridor back to the surface is a zone because if you’re there, you’re running.

Zones are words. “The doorway.” “Behind the barricade.” “The far side, past the overturned table.” They encode tactical identity in language, not coordinates. The cognitive load is three or four named places, not a hundred measured squares. There’s no fucking pixel-bitching square-counting and does the diagonal count double and what if I move through a threatened square and blah blah blah blah.

Zones abstract all that pixel bitching away, but they still have teeth. Movement out of your zone costs your action, in the Fast phase. And here’s the kicker: leaving a zone where enemies are present triggers a free Wild Swing against you. If the enemy is a monster, that Wild Swing auto-hits for half damage.

Zones are sticky. That stickiness is what makes positioning matter. The Warrior in the doorway zone holds the doorway, because the goblins behind her would eat a free hit trying to push past. The Scout perched in the ledge zone controls that sightline, because climbing up to her means giving up an action and risking the fall.

Zones, Wild Swings, and Defend lock together. The Warrior Defends in the doorway. The goblins can try to rush past and eat the Wild Swing. They can try to hit the Warrior and face her Advantaged Parry, or they can stay put. Those are real tactical choices, produced by three rules that each fit in a single sentence.

No grid. No “Can I reach the goblin from here if I move diagonally?” You’re in the doorway or you’re not. The abstraction is the clarity.

What, When, How

Here is the thing I think I pulled off.

CRAWL! puts almost no constraint on WHAT you can do. The action menu is wide open. There are no “you must be this class to attempt this action” gates. There are no “you’ve used your bonus action so you can’t” locks. Melee, magic, ranged, social, fleeing, assessing, defending: all available to everyone, every round.

The constraints live in WHEN you are able to do it and HOW Effective it will be as a result.

Every “Yes, sure you can do that” has a “when” and every “when” has a cost. The constraint architecture is orchestration and effectiveness. You are always free to act, but you have to live with the consequences of your timing.

And the table talk… all that beautiful, chaotic, sixty-second negotiation before the dice hit the trays, is the proof that it works. Nobody consults their character sheet for optimal action sequencing. Nobody calculates movement budgets. Everyone is strategizing and horse trading each other about who goes where, who covers whom, who takes the risk and who takes the safe play.

The complexity ends up being SOCIAL not mechanical. And that, friends… because RPGing is a SOCIAL game… is chef’s kiss.

I wanted a tactical combat system that felt like a team solving a problem under pressure, not four pre-streamlined character sheets optimizing their personal action economies in sequence.

Ya get one action, two trays, named zones, and nowhere to hide. Those are the constraints. The poetry is what the players write inside them.

That is the sonnet. Fourteen lines. Infinite things to say.