Explore Halo 3: ODST's journey from DLC to full game, or in the words of cinematics director CJ Cowan, "Here's an engine, here's a story, you got a year. Go."

Cowan's quick and dirty summary of the project might be accurate, but it downplays the sheer amount of work that Bungie has put into Halo 3: ODST. The idea of some quick and dirty single-player downloadable content blossomed into an undertaking worthy of a full retail release, with new weapons, advanced technology, and a new art direction that makes ODST a completely separate beast from the Halo 3 we know.