Trine, the cooperative platformer from Frozenbyte, has until now been thought to be a PSN/PC exclusive (which is a fancy way of saying it's not on Xbox Live Arcade). We were surprised upon entering Atlus's booth to find Trine running on ... well, a PC, but it's supposed to represent an XBLA version, just because the actual XBLA game isn't ready to show. Despite the game not being a super-niche RPG, Atlus has seen fit to secure the publishing rights.

The XBLA version of Trine should be out "later this year," according to Atlus, at some unspecified time that happens to fall after the "later this year" release for the PSN and PC versions.

This article was originally published on Joystiq.

Video: Jak & Daxter travel to the Lost Frontier