Out of your list. Halo 2! The multiplayer was a real game changer that I sunk hundreds of hours of my life into.
As far as a single player experience goes. I'm going to need to give it to Advent Rising hands down. The phenomenal epic story by Orson Scott Card, the rich worlds, and the fantastic gameplay is out of this world. The game is very ambitious and it was very expensive. The ability to switch between guns and psychic abilities on the go is amazing and allows for a wide diversity in combat choices in this game. Unfortunately the game underperformed in sales in Halo 2's shadow and too close to the 360's release date. For those who wondered what happened to Majesco? This is it right here. They could have ascended to one of the best companies in the world had they marketed this game right, which happened to have one of the craziest marking schemes ever. With millions of dollars worth of prizes for gamers to unlock in game. Which is how it took advantage of XBL.
Not only is the story fantastic. The game play is out of this world. Very ambitious. I highly recommend that people pick this up off Steam. 
