If you're looking for a digital copy of BioShock 2 right now, you might be out of luck. The game has disappeared somewhat unceremoniously from a number of online stores, including Steam, Amazon, Apple's App Store, the PlayStation Store and Xbox Games Store.

Digital versions of the game and its downloadable content, including the Minerva's Den add-on, seem to have been removed late last week, based on some discussions on Steam's BioShock 2 community hub.

BioShock 2 turns five years old today, leading some speculation that the game's digital disappearance is somehow related to an expired licensing deal. The game features a number of licensed musical tracks from the 1920s to 1950s. Other BioShock titles do not appear to be affected by BioShock 2's delisting.

BioShock 2 was released for PlayStation 3, Windows PC and Xbox 360 in 2010. The game and the Minerva's Den add-on came to Steam in 2013, following the closure of the Games for Windows Live marketplace.

Update: A representative for 2K says the game will be returning to digital stores soon. Their full statement follows.

"BioShock 2 has been temporarily removed from the Steam, Xbox Live, and PlayStation Network marketplaces and will return to these digital stores soon. We'll let you know when that happens. In the meantime, this in no way affects the single-player or multiplayer experience for those who currently own BioShock 2."