The new content for Overlord comes in three distinct flavors. For starters, there's the Raising Hell expansion pack, which adds a handful of new missions to the game, picking up immediately after the events of Overlord. This full featured single player experience will run fans a cool 800 Microsoft Points. Next up on the menu is the Overlord Challenge Pack, which includes seven new multiplayer maps, as well as a new and particularly nasty "Legendary" mode for single player gameplay. The Challenge Pack clocks in at 400 Microsoft Points. The last of the trio of downloads is a freebie, the Split-Screen Multiplayer Pack, which as the name would indicate, adds a split-screen option for multiplayer so two friends can tackle the challenges with or against each other on a single console.