Xbox.com either made a mistake or Bungie decided to surprise us. Either way, this is big.
The title update that went live today for Halo 3 adds achievements which total an extra 250 gamerscore. Of course, we all saw the leaked list of achievements with a total of 750 additional gamerscore a while back. Bungie wouldn’t comment. Then we saw Halo Mythic leak out of PAX. Bungie wouldn’t comment. Now, we have some pretty undeniable proof that the additional 500 points and Mythic exist.

The list reveals that we will be getting a new map pack, the Mythic map pack. It is unclear if these maps will be single player, multi player, or both. The achievements show that there is a skull to be found on each map, which points to single player.

The map names are also given away. Assembly, Citadel, Heretic, Longshore, Orbital, and Sandbox could be making their way onto our Xbox 360′s in the near future.

All told, this is a pretty big update for Halo 3, and a big step for Microsoft. No other title has been allowed to add this much gamerscore. Could this be a sign of things to come? Will games like GTAIV or Gears of War 2 end up nearly doubling their scores? Do you guys think it’s something you want to see happen?

