actually i think Halo 2 ... at the time was the best in the series, it ha some much cool new stuff i.e. boarding, dual wielding, stuff that really influenced the game, made it much more fun and increased the replayability, and while halo had guilty spark and the library, and halo 3 had cortana, halo 2 wasnt as bad in horrible levels
we were at a church new years party they hooked up 4 xboxs to gether and had a huge battle one guy was in a building on snow bound and he killed 8 people within 4 seconds of each other it was hillarious