Not Sci-Fi this time, but it is really good too. Play as cop or gangster, you can help your friends or bust them. Nice MMO :)

Super BIG map.It is a Sci-Fi war simulator i would say.You get in to tank,motorbike,drophip and more with your friends and try take control of the map.

This is a great game, you can craft your warframes, weapons, play with friends, meet them in Relays. No purchases requiered to gain full access.