Halo game series, science fiction, first-person shooter, Master Chief, Spartan armor, futuristic weapons, alien Covenant, space battles, ringworlds, UNSC, Xbox exclusive, chronological release, Halo: Combat Evolved, Halo 2, Halo 3, Halo Wars, Halo 3: ODST, Halo: Reach, Halo 4, Halo 5: Guardians, Halo Wars 2, Halo Infinite, dynamic lighting, epic soundtrack, multiplayer maps, campaign mode, Cortana AI, detailed textures, high-resolution graphics, 3/4 view, action-packed scenes, interactive environments.