Trespasser: Dark Fantasy Tactics

From the introduction: Trespasser: Dark Fantasy Tactics is a roleplaying game about peasants-turned-adventurers seeking safe refuge amid the long collapse of their dying world. Designed for player-driven, sandbox style campaigns of survival and dungeon crawling, Trespasser borrows principles of early tabletop: power is low, battles are deadly, and adventurers are self-interested. It pairs these concepts with a robust tactical combat system inspired by Dungeons & Dragons (4th Edition).