BS2 meaning in Computing ?

BioShock 2 is a first-person shooter video game developed by 2K Marin and published by 2K Games. It is the sequel to the 2007 game BioShock and was released worldwide for Microsoft Windows, PlayStation 3, and Xbox 360 on February 9, 2010; Feral Interactive released an OS X version on March 30, 2012. Set in the fictional underwater dystopian city of Rapture, the game's story takes place eight years after BioShock. Assuming control of Subject Delta, a hulking Big Daddy, players are tasked with fighting through Splicers, the psychotic human population of the city, using weapons and an array of genetic modifications. The game also includes a story-driven multiplayer mode that takes place during Rapture's civil war, before the events of the first game.

BioShock 2 was chiefly developed by 2K Marin, with 2K Australia, Arkane Studios, and Digital Extremes providing additional support. The story received major changes over the course of development. Garry Schyman, the composer of the first game, returned to create the score for BioShock 2.

The game received positive reviews upon release, with praise directed at the game's narrative, art style, characters, ending and gameplay. However, the game attracted criticism for having a slow start and being too similar to its predecessor. The game was supported with downloadable content upon launch, and a new single-player campaign, titled Minerva's Den, was released in August 2010. The game sold more than 3 million copies, but did not meet the publisher's sales expectations. A remastered version of the game was released as part of BioShock: The Collection for Windows, PlayStation 4, Xbox One, and Nintendo Switch.