10 new achievements which will add 250 to your Gamerscore will be included with the Halo 3 update due later this month.
The new achievements are:
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.
