The latest update for Halo 3, imaginatively called Title Update 2, has been released into the world of Xbox Live and is now available for download, given the presence of a Halo 3 disc in your Xbox 360 drive.

Two of the major additions to the Halo 3 experience would be the that of 10 new Achievements as well as something called ‘Playlist Ratings’, which Bungie describe:

“In a nutshell, playlist ratings are the playlist-level decoupling of Trueskill values (the in-game number next to your name) from Experience (the icon next to your name). You will now have a separate military rating (based purely on EXP) in each playlist. So this means that being a General in a playlist is based on how many games you’ve won in the playlist, not based on the Trueskill number next to your name. Your Trueskill values are NOT being reset. If someone checks your service record, they will still see your Highest Skill.”

If that meant anything to you… you’re hardcore. For the full list of Achievements, click along below.

• 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.

For even more details on the Achievements, as well as a mini Q&A regarding the rest of the title update, go get the official skinny at Bungie’s site.