The Binding of Isaac: Repentance

Repentance takes Isaac to new heights of roguelike dungeon adventure, as the brave boy descends into the basement for his greatest challenge yet! Isaac's new quest takes him to unknown places he's never been, filled with horrible new enemies and bosses, weapon combos you've never synergized before and items he's never seen... unholy terrors from his wildest dreams and worst nightmares! (store.steampowered.com)