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Grab yourself the pdf and give Gambit a shot! If you'd like a game to go with it, do check out The Nest, a Superhero scenario created specially to work with Gambit (which comes bundled with the system rules). If you like the system, there's a second iteration of it over here, made for a different game but available standalone, too. Gambit is a simple,  adaptable, modular, playing card based storytelling system with 3 levels of intensity, to suit the preferences of any Player group.