There was palpable disappointment following the release of "Halo 2," and not just due to the 'well, I guess we'll stop here' ending. From the first teaser, the tone of the marketing campaign was that you (well, Master Chief) are the only guy who can defend Earth. Combine that with the "I Love Bees" alternate reality game, which concluded with the characters' lives being interrupted by air raid sirens, and you were ready to save humanity from the Covenant when you walked out of that store on November 9.
The fact that you end up playing as one of them for half of the game was quite a betrayal of expectations. But "Halo 3: ODST..." Well, if you squint and look at it hard enough you might see a version of "Halo 2."
After all, it takes place entirely on Earth, and the player is always fighting the Covenant invaders. You spend a lot more time defending New Mombasa than Master Chief does in the second game's opening levels.
Additionally, the radio play you assemble through picking up collectibles really drives home the fact that this is a city on Earth that people used to live in. It also calls back to the excellent pre-"Halo 2" "I Love Bees" alternate reality game's radio drama, and for good reason - some of the same people are responsible.
The game's mechanics are also a callback to the original "Halo." The absurdly fun yet incredibly overpowered scoped pistol makes a silent return, and its balance is no longer a problem thanks to the lack of competitive multiplayer.
You also have a health bar again, and pick up refills for it, just like "Combat Evolved." ODSTs also take fall damage after a large enough drop, just like Master Chief did in his freshman outing.
Of course, there are many things about "ODST" that are the same as "Halo 3," or wholly new to the series. You don't fight elites, for instance, just brutes, and nearly all of "Halo 3's" weapons make an appearance alongside the reborn pistol and silenced "Halo 2" SMG. However, it is curious how many of "ODST's" changes are callbacks to Bungie's original breakout hit.
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