First-person shooter where you drive and walk around in the same areas over and over again and shoot the same strange little gnome like creatures. You take the role of a super soldier called Master Chief that after a desperate escape from evil aliens fall out of hyperspace beside the a mystical ring in space, the Halo. The aliens with the name of The Coventant also drop by and then it turns into a minor war on and about the control of the Halo and to find out what it does.

Gameplay is like in most other first-person shooter but this game was the one that really get that regenerating shield/health thing stated where you simply take cover for a while to recharge it.