warframe.com
Going to see if I can get other people looking into this game. I've been playing in closed beta for about 2 weeks now its really awesome, and hard to explain what it is.
Pretty much you go through a story but through multiplayer, almost like Diablo with the option to play offline as well. Even though its a pain in the ass to play without friends its still enjoyable with 'enterable lobbies'.
Anyways, check it out, sign up for closed beta and I would like to play some people sometime.