dungeon crawl stone soup is alright
cataclysm is good, it is a post zombie apocalypse sim where you can starve to death or get strung out on drugs and alcohol etc
my first experience was making a character and being attacked by a crazy npc bitch at the starting location, she used a sledgehammer to break both my arms and chased me down the road before suddenly exploding due to having a grenade on her belt go off and shrapnel pierced my leg and crippled me and burned me severely, i looted her and her inventory was full of drugs, guns, ammo and gold bars, she was also listening to an mp3 player and i would have taken everything but my guy was so fucked up that he couldnt pick up anything heavier than the mp3 player, so i took that and put it on and wandered around until i got eaten by wolves