original f2p mmo?

[Armagedo0]

I'm looking for a original free to play mmorpg.
with original I mean that it has to be other than the mideval themes, fighting, smithing,...
and all the other things that almost every mmorpg has.
It may have those elements but it needs something crazy
Don't mind if it's 2d
linux support would be nice but dousn't have to

Hope you guys can help me because I'm bored of the 13 in a dozen mmorpg's.