We thought the viral marketing for BioShock 2 would come to an end after the game was released. But no! As it turns out the Collector's Edition of the recent first person shooter sequel from 2K Marin has at least one big secret that some folks in the game's message boards found out.

The three art deco-style posters that come with the Collector's Edition have some hidden message that can only be seen in the dark with a blacklight device. Our BioShock 2 reviewer James Murff happens to own both the Collector's Edition and a blacklight and lo and behold! The reports are indeed true. You can check out our blacklight pictures of the posters below.

[Via Kotaku]