Chaser

Chaser is a first-person shooter action video game developed by Cauldron HQ. The game is built on the CloakNT 3D engine. The player character passes through real environments and uses real weapons. Unlike many other science fiction first-person shooter (FPS) games like Halo, Pariah, WarPath, and Unreal Tournament, Chaser's weapons fire modern day projectiles. Source: Wikipedia, "Chaser (video game)", available under the CC-BY-SA License.