USR Wednesdays: Critical Hits

One of the few things USR doesn’t do well, because of the way it uses dice, is represent critical hits. In the d20 system, for example, a roll of 20 is a critical hit, since all attacks and skill rolls use the same die. But in USR, a player could be rolling a d6, d8, d10 or d12, and using the “you score a critical on the max result of the die” idea doesn’t work, mathematically speaking (you have a 16.6 percent chance of rolling a 6 on a d6, a 12.5 percent chance of rolling an 8 on a d8, a 10 percent chance of a 10 on a d10, and and 8.3 percent chance of rolling a 12 on a d12).

Critical Points

But scoring a critical hit is a lot of fun, and it opens the game to lots of different story opportunities — a quick search online turns up pages and pages of critical hit charts with different effects. The Unbelievably Simple option for critical hits is to simply add damage to the attack (called Critical Points in the chart below), hit points that the opponent loses, even if the enemy has a high enough roll to cancel them out.

Die Type

Critical Points









For example, Bragan the barbarian, with an Action stat of D10, rolls a 10 on the die, and adds his Greataxe +2 for a total of 12. Kyranathus the dragon, also with an Action stat of D10, rolls a 9 and adds +1 for his Scales, for total of 10.
Barbarian vs Dragon
Bragan and Kyranathus, just before the critical is rolled. (image:

Normally, that means Bragan did 2 damage (since the defensive result is subtracted from the attacking result, and the leftover is applied to hit points). But with the Critical Hit roll, he gets 3 Critical Points, and the dragon takes a total of 5 damage. Even if the dragon somehow had a defensive total of, say, 15 (more than Bragan’s attack total, which would ordinarily result in no damage at all), the Critical Points would still apply, and Kyranathus suffers 3 damage.

Special Effects

Another option is spending Critical Points instead, or in addition to applying damage. These can be spent on the following options (and, of course, feel free to create more options):

  • Mighty Blow: roll 1d6 for additional damage, which can be blocked like ordinary damage.
  • Quick Response: make another attack against the same enemy.
  • Special Maneuver: the enemy is tripped, drops his weapon, loses the bonus for his armor, or some similar effect (the attacker chooses at the time the critical is rolled).
  • Sudden Movement: your hero moves up to half his ordinary movement rate immediately after the attack.

Use The Charts

Finally, you can roll a number of times on any critical hit chart you want equal to the number of Critical Points you have, and pick the option you like best. This may call for some judgement on the part of the game master if the critical hit chart has game effects that aren’t used in USR, but the simplicity of the system means it shouldn’t be hard to figure out.

What do your characters do when they crit?