The game is great. The inability to play 3-4 player splitscreen is a downside though

User Rating: 9.5 | Halo 3: ODST X360
Halo 3: ODST is a very fun and addicting game. The campaign may not be very long but it is still very fun, filled with many epic battles accompanied by interesting music. The enemies are mainly the same but the new pistol and sub-machine gun are awesome to use. Firefight has to be my favourite addition though. The battles are intense and the skulls make them even better, though much harder. The medals that are awarded usually in multiplayer can be awarded in firefight as well. You may not think very much if you get a "Triple Kill" from beating up three grunts, yet after awhile it becomes very awarding and just makes you feel good.
The only downsides to this game that I found is that you can't play with 3-4 friends split screen on firefight, which really sucks. Also the online multiplayer is relatively the same as Halo 3's, but with three new maps.
But If you love Halo, or just like first person shooters, or just like killing aliens, get this game it want disappoint.