It's not really that big of a deal now, since most people got them with the release of ODST, (or maybe just most people I know, I guess. Apparently. ODST wasn't that big for most people) but Longshore, Heretic, and Citadel are officially on Xbox Live Marketplace for everyone who didn't buy ODST.
Link!
Halo 3
Game » consists of 17 releases. Released Sep 25, 2007
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