Third-person cover shooter where you lead a squad underground to stop giant worms from collapsing cities. You're Marcus Fenix, a COG sergeant fighting the Locust—subterranean enemies literally eating the ground beneath human civilization on planet Sera. The campaign takes Delta Squad deep into the planet's interior to kill a massive riftworm before it devours more infrastructure. Expect chainsaw-bayonet firefights, destructible cover, and squad commands as you push through tunnels and caverns. The story shifts when you uncover why the Locust are doing this in the first place. Co-op supports drop-in/drop-out play. Multiplayer includes Horde mode—waves of enemies against your team. Grittier and more desperate than the first game, with larger set-pieces and underground environments replacing surface battles.
