It seems like the following cryptic achievements are only available on the Steam version, not XBLA.

• N#7*<1!23
• &*>?1$
• (=+66&1$
• ^**5%_=+12
• *|-0&&
• N&8^2^%$1``

The "description" on all of them is: 8*(@31^

###Bonus (bounty) points: Are the names/characters truly random or is there some pattern? Can they be translated into something sane?