Finish Halo 2

Finish the fight; the trilogy ends with Forge and theatre mode.

Master Chief on the ring world, the warthog and the Flood; the Xbox is launched.

Noble Team's last stand; the prequel where you lose from the first minute.

343 take over and make it a story about Cortana dying.

A grappling hook and an open Zeta Halo; the Chief in a sandbox.

Guardians, raids and the loot loop; Bungie after Halo.

Bungie after Halo: the Traveler, the raids and a story assembled from grimoire cards.

True 3D, brown corridors, a Nine Inch Nails soundtrack and the birth of deathmatch.