No studio has more experience with DLC than Bungie, creator of the "Halo" franchise on Microsoft's Xbox 360. The latest addition, out this month, is the Mythic Map Pack, which turns three of the settings from "Halo 3" into multiplayer arenas.
Bungie community manager Brian Jarrard calls DLC "a great bridge between products" - in this case, between 2007's "Halo 3" and this fall's "Halo 3: ODST." "We have a real desire to keep players engaged," Jarrard says. "If they're still playing 'Halo 3,' they're more likely to buy 'ODST.'"