The rumor was quite big since a few days, and it's now official. Halo 2 will have its expansion pack. It will be available as a retail product in May, but also on Xbox Live with a special release : First patch of the bugs and cheats in April, then a few days later, also in April, 2 free maps and 2 to buy. Finally in june at the same time than the retail version, the other 5 maps will be available. You will also be able to get all 9 maps for free at the end of Summer if you can wait until then. First images of the first 4 maps inside.