Shank is out on both PSN and XBLA. It's probably one of the most violently addicting side-scrolling action games to release in a long time. Don't be fooled by the cartoony visuals, the blood and gore speak otherwise.
However, while Shank runs perfectly fine on the PS3, it appears that the Xbox 360 version is suffering a few problems. Loading time and cutscenes appear slow and sluggish and according to Klei Entertainment, "some Xbox 360's are having slower disc access rates due to fragmentation," causing the slow loading times. This doesn't affect gameplay though.
Klei also mentions that should customers unlock the trial on the 360, the first two achievements may not unlock, but they aren't just twiddling their thumbs over at Klei, they already have a fix for this so 360 users simply need to wait for the patch.
Source: Shank Official Website