The Binding of Isaac/The Binding of Isaac: Wrath of the Lamb
Remember how cool Legend of Zelda was when you were just a dumb little babby? And how scary basements were? Then if you grew up in a Christian household, you’ve got quite a background for The Binding of Isaac to flashback at you. The combat takes some getting used to, but eventually you can get the hang of it, and with some good item drops, become a true monster to be feared.
If you missed Zelda, were scared of nothing, and weren’t exposed to religion growing up, Isaac is a respectable place to work back from should you want to experience something close to an interesting, flavorful life.
Dungeons of Dredmor
If the jokes in Dungeons of Dredmor don’t first slay you, the monsters surely will. No kidding, Dungeons is funny and incredibly difficult, but the RPG system is good and the turn-based combat gives you just enough hope to think that maybe, one day, you can kill all those monsters on the screen that were behind the door you just lock-picked.