True20 is an award-winning universal generic role-playing game designed by Steve Kenson and published by Green Ronin Publishing.
Utilizing the Open Gaming License, True20 is derived from Wizards of the Coast's d20 System. Differences from the parent game include the following:
There are only three character classes, referred to as roles: warrior, adept and expert.
A single 20-sided die is used for each roll.
Ability scores are given as simple modifiers (+1, +2, etc.) rather than as a statistic ranged from 3-18 (which in other systems would then be cross referenced against a table to convert them to simple modifiers).
There are no class-specific or restricted skills, thus characters of any role can have any skill.
New feats are available at each level.
Magic spells are treated as feats and do not have "levels".
Instead of hit points, characters simply experience "damage conditions" like that of Mutants & Masterminds.
Instead of experience points, characters automatically increase in level at the Narrator's discretion, usually after one or two adventures.