True20 is a role-playing game system designed by Steve Kenson and published by Green Ronin Publishing. The system was first published as a part of the Blue Rose RPG before being published as a standalone universal generic role-playing game, True20 Adventure Roleplaying. History The True20 system was originally used in Green Ronin's Blue Rose, itself based on their Mutants & Masterminds RPG. Later that year, Green Ronin released a PDF distillation of the Blue Rose rules, with an appendix of some modern-era rules, as a generic form of the game. This was followed by an expanded hardcover release in 2006. A revised softcover rulebook, combining the rules section of the True20 Adventure Roleplaying book with the True20 Companion was released April 25, 2008. Settings The original setting for the system was the Blue Rose in which the system first saw print. In its generic role-playing game, the original hardcover printing of the True20 Adventure Roleplaying book included four sample settings. These were chosen among publisher submitted setting with the winners announced in Dragon Magazine: "Caliphate Nights", a fantasy version of the golden age of Islam, circa 800 AD. A full-color standalone hardcover was released for the setting at Origins 2006. "Lux Aeternum", a swashbuckling space opera. "Mecha vs. Kaiju", in which giant robots protect Japan from giant monsters. "Borrowed Time", a setting of Kung Fu action and gunplay against a backdrop of time-controlling conspiracies. The Revised Edition has four different settings: Fantasy Adventures Space Adventures Horror Adventures Modern Adventures A follow up volume, True20 Worlds of Adventure includes five additional settings: "Agents of Oblivion" "Blood Throne" "Land of the Crane", an Asian fantasy setting. "Nevermore" "Razor in the Apple", a horror setting in which kids face monsters lurking the neighborhood, inspired by films such as The Goonies. System 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 in the range from 3-18 (which in some other systems, such as d20, would then be converted 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