 First @-@ day sales of Halo 3 reached $ 170 million in the U.S. , setting a record for highest gross of an entertainment product within 24 hours of its release . The performance beat the previous record setter — Halo 2 — which earned $ 125 million within 24 hours after its launch . The game was preordered by more than one million people in North America . Worldwide more than US $ 300 million worth were sold in the first week , helping to more than double the sales of the Xbox 360 when compared with the weekly average before the Halo 3 launch . 
