An OSR - Old School Renaissance System Also Known As Oh! Shit! Run! User Summary: This free web-published PDF role-playing game is based on various editions of D&D and its derivatives, expanding out the basic options to include additional choices relevant to the author's game world. Races comprise: dark elf, dwarf, elf, half demon, half elf, half orc, Halfling, human Classes comprise: fighter, ranger, rogue, barbarian, monk, alchemist, sorcerer, druid, warrior priest, witch