Halo 3Halo 3 is a 2007 first person shooter game developed by Bungie for the Xbox 360 console. The third installment in the Halo franchise, the game concludes the story arc begun in 2001's Halo: Combat Evolved and continued in 2004's Halo 2. Halo 3's story centers on the interstellar war between twenty sixth century humanity, a collection of alien races known as the Covenant, and the alien parasite Flood.