So I bought Shattered Horizon today on Steam and I must say that was the best 20 bucks I ever spent. It's a Multiplayer only FPS set in space with full 360° movement in Zero-G.
The whole space immersion is amazing and the graphics are great!
I never before played a FPS for so many hours in a row before... It has three different gamemodes and vast tactical possibilities due to all the freedom.

I could write more but it has a greater effect to just show a video^^

Source: YouTube


If you want to play something different give it a try 20 bucks aren't that much, if not atleast spread the word, the developers don't have much money for marketing so they are dependent of people to tell about it.

Be warned though, this game NEEDS DirectX 10 so you need Vista or Win7 along with a DX10 capable Graphics card to play it!