One-Roll Engine

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The One-Roll Engine (or O.R.E.) is a role-playing game generic system that developed by Greg Stolze for the alternate-history superhero roleplaying game Godlike, and expanded and improved during the development of Wild Talents. The O.R.E. gaming system is notable for its unique dice rolling system where matched values on ten-sided dice (d10s) determine all necessary combat information like initiative, hit-location and damage all in just one roll.

[edit] Mechanics

The O.R.E. system involves a Dice Pool of d10s equal to the character's Stat and Skill similar to that used by Storyteller system, but the method to determine success is radically different. In the O.R.E. system success is determined by die result matches, such as a pair of 8s, are needed for success. The Width of a roll, the number of matching dice, determines the speed, and damage if in combat, of a roll, while the Height of a roll, the face up result on the matched dice, determines how successful an action was, and location of a hit in combat. Shorthand notation for writing results is Width x Height, so a pair of 8s would be written 2x8 and three 2s would be written, 3x2.

There are also two special types of dice that come from Talent Powers, Hard Dice, which are considered to always have a value of 10, and Wiggle Dice, which the player can assign any die result to after the roll. The shorthand notation for Hard Dice is hd and Wiggle Dice is wd, so a Dice pool of six regular dice two Hard Dice and one Wiggle Die would be noted 6d+2hd+1wd.

NEMESIS introduces Expert Dice may be used as normal dice or the player can to select their value before the roll, but no two Expert Dice can be selected to have the same value. Expert Dice are also used as buffer against die penalties, where each Expert Die counteracts one die penalty, but then must be rolled as a normal die. NEMESIS also renames Wiggle Dice to Trump Dice. The shorthand notation for Expert Dice is ed and Trump Dice is td.