First-person shooter built around what Bungie calls the Golden Triangle: guns, grenades, melee. You're on foot most of the time, occasionally driving Warthogs or piloting tanks. Dual-wielding returns—grip two weapons at once, but you lose grenades and melee until you drop one. New support weapons are heavy two-handers that slow your movement but hit hard. Equipment is single-use gear like bubble shields or regenerators; carry one at a time. Your secondary weapon now shows on your back. The campaign wraps the original trilogy's story. Master Chief and the Arbiter chase a Covenant prophet through a portal to the Ark, a Forerunner installation outside the galaxy. The Flood show up, alliances shift, and you activate an incomplete Halo ring to wipe them out before escaping. Multiplayer includes Forge mode for custom maps and four-player co-op.
