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The game was a percentile-based system and used only 10-sided dice ( d10 ).

Characters had attributes rated from 1-100 ( usually in the 25-75 range ) which could be rolled against for raw-attribute actions such as lifting items or getting out of the way of falling rocks.

There were eight attributes that were paired together ( and shared the same rating to begin with )— Strength / Stamina, Dexterity / Reaction Speed, Intuition / Logic, and Personality / Leadership.