The achievement is available as of 1/8/10. You must be at least a level 90, minimum level to do the S2 rank mission. You will not be able to beat it at level 90 though, you will need people who are much higher in level.
Kira J Masaki said:how in the world do you hack something like?
From my understanding, there is a computer program that you download. You then hook up your hard drive using a hard drive transfer cable. I don't know the details, but it allows you to unlock achievements. Then when you put your hard drive back on your console, the achievements are there (acquired offline of course). These are very easy for other gamers to spot though. Microsoft should use TA as their enforcement team (they do a much better job).