The most overrated game in history probably, Halo 2, does not deliver at all and is easily beat by many PC Shooters.

User Rating: 7.3 | Halo 2 XBOX
Halo 2. Halo fanboys will drool over (uninspired) multiplayer that has been seen time and again in better forms on the PC. Nothing in the multiplayer is new and Xbox fanboys are being just... fanboys.

The Soundtrack to this game is awesome and so are the graphics, but the gameplay is just not there. The Arbiter levels are all horrible. And the last couple Master Chief levels are just as bad. The gameplays is overly repetitive, even more so than Doom 3.

If you are in for multiplayer, then you should look into PC games (you don't have to pay for a "Xbox Live!" like account and you can play Quake 3, UT2k3/4 and BF2 and CS 1.6.