I'm a Warrior! Now I'm a Necromancer! Now I'm a Triclops Monk! Now I'm a Giant Spider! Now I'm a Cosmonaut! Now I'm an Alien Robot! Now I'm a Drow Ranger! Now I'm a Chicken!
Great Dungeon In The Sky is Diablo/Pokemon/Spelunky. It is a 16ish-bit-esque stabby-jumpy game in which, as well as carving your way through the semi-randomly generated levels, you collect new character classes. Kill a Dire Jelly, and you can choose to play as Dire Jelly come the next level/death. Kill a Witch and... well, you don't want to play as the Witch, trust me. Rubbish! The Giant Spider's my favourite so far, but there are dozens I'm yet to unlock. What the game may lack in terms of combat/platforming mechanics, it more than makes up for in compulsive collection of new characters. All of which pack Cute Factor Maximum into their 20-odd pixels. (Thanks to Bret Anderson for the tip, and for making Dog Man Star).