RPG System Guide

Ironsworn: Dice & Strategy Guide

A rugged fantasy game you can play with a group, with friends and no GM, or entirely solo. Here is how the action die and challenge dice work, and how to read every hit, miss and match.

Ironsworn, by Shawn Tomkin, is a fantasy roleplaying game with a special gift: it plays just as well solo or co-operatively as it does with a GM. Its dice system is built to give you clear, evocative answers without anyone needing to sit behind a screen. At the centre is a distinctive roll — one die trying to beat two others.

The dice and the core mechanic

Ironsworn uses a mix of dice you may already own: one six-sided die as the action die, and two ten-sided dice as the challenge dice. When you make a move, you roll your action die, add the relevant stat (and any bonuses) to form your action score, then compare that total separately against each of the two challenge dice.

The question the dice answer is simple: did your action score beat one challenge die, both, or neither? That comparison produces the game’s three outcomes and drives every move you make.

How a roll resolves

  • Strong hit — your action score beats both challenge dice. Full success; things go well and you keep the initiative.
  • Weak hit — your action score beats one challenge die but not the other. You succeed, but with a complication, cost or reduced benefit — the move tells you the price.
  • Miss — your action score beats neither challenge die. Things go wrong, and you usually face a hard turn in the fiction or pay the piper.

Layered on top is the match: when the two challenge dice show the same number, something notable happens. A match on a hit signals an unusual twist of good fortune or an extra opportunity, while a match on a miss makes the setback especially dramatic — a chance for the fiction (or an oracle table) to introduce a serious complication. Matches are the game’s built-in prompt to escalate, which is invaluable when you are playing without a GM to spring surprises.

Ironsworn also frames progress differently for big challenges. Long-term goals become vows tracked on progress bars; you fill the track by overcoming obstacles, then make a separate progress roll — comparing your marked progress against the two challenge dice — to see whether you finally fulfil the vow.

Effective strategy

  • Understand the odds of two dice. Beating both d10s is meaningfully harder than beating one, so weak hits are common. Build your action score up — a strong stat plus a good die plus bonuses — to convert those weak hits into strong ones.
  • Seek momentum. Momentum is Ironsworn’s signature resource: positive momentum can be burned to replace your challenge-dice result and turn a miss or weak hit into a better outcome. Bank it on good rolls so you can spend it when a roll truly matters.
  • Set the vow that fits the stakes. Framing a goal as a vow of the right rank sets how much progress each success is worth. Pick a scope you can actually fill, and mark progress diligently so your final progress roll lands from a position of strength.
  • Read weak hits as forward motion. A weak hit still succeeds. Accept the cost, keep the story moving, and avoid the trap of re-rolling or second-guessing — the complication is the interesting part.
  • Lean on the oracles. In solo and co-op play the oracle tables answer the questions a GM normally would. Use them freely to interpret matches and misses, and let the dice surprise you rather than pre-planning every beat.

Beginner tips and common mistakes

  • Don’t add the two d10s together. The challenge dice are read separately — your score is compared to each one on its own. This is the single most common misread for newcomers.
  • Ties go against you. To beat a challenge die you must exceed it, not merely match it. Keep that in mind when a result is right on the edge.
  • Watch for matches every roll. It is easy to overlook two identical challenge dice. Make checking for a match a habit — it is the game telling you to raise the stakes.
  • Manage momentum actively. Momentum is not just a number that sits there; burning it at the right moment is a core skill. New players often forget they can reshape a bad roll with it.
  • Free tools exist. The original Ironsworn rules are available at no cost, which makes it an easy, low-risk system to learn — ideal if you want to try structured solo play.

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Curious about the design family Ironsworn draws from? Read our Powered by the Apocalypse dice & strategy guide.