Play the most realistic 3D shooting alien games online only on brightestgames.com. Try this fun fps army game called Space Marines games. Space Marines is a fun futuristic 3d shooting game send on a distant planet. Being the best-trained space marine like a halo type of soldier you must use your skills and infiltrate the alien space station that prepares weapons for an earth invasion. Destroy the core on each space station and kill all alien soldiers earth depends on your action. Save all living thing on earth and become a true hero in Space Marines games here on brightestgames.com! For more similar y8 game check out categories of 3D shooting games! Good luck and have fun!