Pretty self-explanatory. So, this thread is to discuss the most recent Achievement (Xbox)/Trophy (PS3) that you got. You can include when you got it, but if you don't know that's fine. Also, you don't have to post the second you get a new Achievement/Trophy.
As for me, my most recent achievement was "Steal Home" on Assassin's Creed II, which I got today. Also got a few other in ACII today, but that's the most recent.
EDIT: THIS IS ONLY FOR THE XBOX 360/PS3/STEAM SINCE NINTENDO DOESN'T HAVE ACHIEVEMENTS OR TROPHIES.