Monsters´ Den

http://www.kongregate.com/games/garin/monsters-den

Finally a roleplaying game that is missing all that unimportant plot or story stuff and just focuses on the real important things: good old round-based fighting, a little bit of character advancement and LOOT!
You can create a group of four characters and explore a dungeon. No traps or unforeseen things. When there are monsters you see them before entering a room and can decide, whether you´d like to fight them or just find another way.

The problem with this game: you will practically drown in loot. There´s so much of it, you must really like equipping your characters after nearly every fight, or else you might loose all those important items that make you stronger.