Blood¸ Guts and Glory (d20)
Blood¸ Guts & Glory is a retro-clone mash-up game that emulates a detailed and gritty set of rules from the 1980's with detailed weapon and critical damage charts¸ but simplified and combined with a more modern set of rules taken from the world's most popular role-playing game.
The default setting is a magical post-apocalypse Elizabethan England populated by anthropomorphic animals¸ although the game includes conversion rules for play in more "generic" fantasy settings.
So pick up your dice and roll some critical hits!