We saw some screen pics from PAX showing new achievements for Halo 3 and Bungie has been tight lipped ever since. Until now. In their weekly update, they confirm that a title update coming later this month will add 10 achievements for an additional 250 Gamerscore points. You can see them all after the jump.

However, the achievements they list aren’t all the ones we saw at PAX, and Bungie confirmed that more are coming, but who knows when. No word yet on when the new Assembly map will be released or what the whole Mythic stuff is all about. Only time will tell, since Bungie keeps everything close to their vest.

Here’s the new achievements:

• Vidmaster Challenge: Lightswitch (0GS) – Get to the rank of Lieutenant in any playlist in the new EXP progression system.
• Vidmaster Challenge: 7 on 7 (0GS) – Enter into any ranked or social playlist with 7 EXP on the 7th of the month.
• Vidmaster Challenge: Annual (0GS) – After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.
• Double Double (25GS) – On a Legendary map, get two Double Kills during any ranked or social match.
• Poor Yorick (25GSs) – On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
• Came…From…Behind (50GS) – On a Legendary map, get 3 assassinations during any ranked or social match.
• Defend This (50GS) – On a Legendary map, get a flag melee kill during any ranked or social match.
• Flag Dropped (25GS) – On a Legendary map, get 2 flag carrier kills during any ranked or social match.
• Road Rage (25GS) – On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
• Look Both Ways (50GS) – On a Legendary map, get a Splatter Spree during any ranked or social match.