The NeuroGen Incident - Interstellar Marines
Interstellar Marines is a sci-fi FPS game that has been in development since 2005. It's gone through multiple game engines and has lost funding in the past. I decided to pick up the early access on Steam, and this game has so much potential!
The co-op mission shown is the NeuroGen Incident. All communications have been lost with the NeuroGen space station, and a squad of Interstellar Marines has been sent to investigate.
http://www.interstellarmarines.com/