Five more games will be making their way to Xbox 360's Games on Demand service. Right now you can get Halo 3: ODST, Earth Defense Force: Insect Armageddon, and Power Rangers Super Samurai. Next week both X-Men: The Official Game and Eat Lead: The Return of Matt Hazard will be added to the service.
What's interesting to note here is that Halo 3: ODST will lack the multiplayer component, which makes this Campaign Edition come in at just $14.99. If for some reason you are DYING for the multiplayer, you'll have to settle on getting the full copy of Halo 3, which is currently at $19.99.