Halo Reach is a great FPS but only a good Halo game. The story told in Halo Reach compared to Halo 3:ODST is night and day. It's more engaging, immersive, and interesting but it doesn't compare to mainline Halo games where you play as Master Chief. In Halo Reach the player experiences the story of a group of Spartan soldiers making a final stand on the planet Reach against the Covenant. A game every Halo fan should play!