Dissappointing
Playing this game as an adult you quickly notice that this has been geared towards teenagers who believe in Aliens and are members of Star Wars clubs. It's almost kinda silly and definitely a bit cheesy.
Games like "FEAR" and "Lost Planet" are far more creative, challenging and unique than Halo 2 and 3.
Also, the game is rather short. Spending $60 for one weeks worth of play is just not worth it, if you ask me.