In case you’re one of the few that have put your Halo 3 disc in the closet for safe keeping it’s time to pull that puppy out, dust it off and pop it in the old Xbox 360 drive. TU2 has arrived bringing with it new achievements and more. According to the Bungie.net update:

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

There are also some other interesting things in the update that you’d be best just to read up on over at Bungie’s update site