* Ultimate Sacrifice
Complete the Arrival DLC.
* Last Stand
Complete all 5 waves in the battle for Object Roh.
* Covert Action
Rescue Dr. Amanda Kenson without attracting hostile attention.
Xbox360achievements.org didn't put any new achievements up, but the PS3Trophies put up those 3 trophies. No cost or release date has been released yet, but I can't wait to have a reason to keep playing Mass Effect 2. Except for the Insane difficulty.
Link someone posted on Bioware's site:
http://social.bioware.com/forum/1/topic/103/index/6128586
PS3Trophies.org:
http://www.ps3trophies.org/game/mass-effect-2/trophies/