Looking for a horribad multiplayer rpg/maybe action game...

Try Chivalry : Medieval Warfare, the game is good, the community can be bad or hillarious, met many awesome people in that game.

Garrys mod is good,you'll enjoy it! :)

Dead Island. Me and my GF had hours of fun with it, most of which were spent laughing at the bugs and voice acting. Though the combat system is actually quite competent.

Ratz Instagib (uses Unity Web Player)

Tactical Intervention ... i always have the most fun in it although it's infested with bugs at times ..

give it a try , free FPS from the maker of CS :)

Not sure if these are along the lines of what you're thinking, but I enjoyed these games (played to the ending) despite them being universally despised:

Space Siege
http://store.steampowered.com/app/10530/

Dungeons and Dragons: Daggerdale (online multiplayer no longer works due to Gamespy shutdown, but local co-op still works)
http://store.steampowered.com/app/99100/

EDIT: I couldn't figure out how to embed links and the above games are $14.99 USD... maybe they'll go under $10 EUR during sale

bloody good time

Ok, thank you guys, seems like we have decided to play Dragonnest:
"Experience a blazing action game of movement and combat." tehe ähem
Maybe I let this thread open for...people?