Well it's not an FPS to begin with, just one guy made it. It's not even out yet and it's already sold Millions! It's kind of a roleplaying game. You begin with nothing and you try to make something out of it by collecting resources. There's no real objective... just survive... and build... it's all about creativity.
Few links below. Don't let the graphics put you off!
Not letting you get on the server? That sucks... Yeah, only thing is I know it looks and performs really well on PC whereas it just sucks on console...
As for MW3 mate... Im completely finished with CoD, haven't played it since Blackops came out! I think GTA5 will be my next game. As for now, it's Minecraft!