My reason is I love the Bungie game HAL0 (duh) and after reading the magizine reviews I heard that bungie has a great fan community in which the players can interact with. Unlike some big game companies like Electronic Arts where they sit in some unaccesable tower. I liked that idea to be able to talk to some of bungie's staff and get the updates on HAL0 2. Also looking at some of the older bungie games myth and marathon I wouldn't mind trying them myself.