As millions devour Call of Duty and Halo map packs at $10 a pop, Sierra apparently didn’t see that as being a profitable venture. That, or they’re just really nice guys.

The first and probably only map pack for the time altering first person shooter contains five maps in a measly 171 MB download. This isn’t a limited time offer or some random act of kindness. They really are free until the end of time, or until you can no longer access the Marketplace to download the stuff. PS3 and PC owners? You get nothin’ apparently. You can get info on the maps from Sierra’s website, or since they’re free, just download them and get it over with.