Null Grav is a modification of the Unreal Tournament 3 engine, and is loosely inspired by the book Ender's Game, by Orson Scott Card. Null Grav features members of Mobile Armed Null-Grav Tactical Assault Corps, or M.A.N.T.A. Corps, an elite squad of soldiers that act as an orbital and sub-orbital police force similar to SWAT. Since its inception, MANTA Corps has neutralized countless terrorist situations, defused bombs, rescued hostages, and destroyed pirate and smuggler ships. When not out in the field, the soldiers of MANTA Corps spend their time training in a special zero-gravity chamber, located inside their space station headquarters, that gives Null Grav its name. This chamber is designed to train the soldiers for a variety of high-risk and dangerous missions that might involve space combat. To achieve this goal, the chamber is capable of being highly customizable, with the ability to swap out various structures inside the chamber to make for unique arena configurations.
Just some screenshots of the first single player level. Hope you enjoy!