Orbital Drop Shock Trooper... there, now you know what the ODST actually means. These are the shock-troops, the hardcore, the 'Helljumpers' of the UNSC forces. The next game in the unbelievably successful Halo series, ODST sees you playing one of them in the form 'the Rookie' as you do first-person battle in the town of New Mombassa.
Don't expect to see Halo 3 references galore though, as ODST is set two weeks before that campaign kicked off. Also, expect challenges and the fact that you are going to have to concentrate in order to beat them... you're a rookie after all. This means that you've got none of the Master Chief-like skills that you may have come to know and love.
You get to team up Buck, Dutch, Romeo, Mickey and the one female team member, Dare, who is also an ONI agent. Being a rookie, however, you get lost and have to find your teammates.
This makes up the engrossing single-player campaign and is more than enough bang for your buck. But the beauty and power of Halo has always lay in its multiplayer. In ODST you get the same great game-play as Halo 3 but with 24 maps including the original Halo , plus the Heroic, Legendary, "Cold Storage", Mythic maps and packs topped off with three new ones: Citadel, Heretic, Longshore.
Not enough? Well, there is also a mode known as Firefight where you have no time limit but you do have to counter wave after wave of enemies.
Basically, it's Halo 3, with more challenges, more to learn, a different plot, the same superb multi-player and even more to explore. An Xbox 360 must-have.