2K and Irrational Games announced today that BioShock Infinite: Clash in the Clouds, the first downloadable content pack for the best-selling multiplatform video game of 2013 to date, BioShock Infinite, is available for download worldwide starting today on the PlayStation 3 computer entertainment system, Xbox 360 games and entertainment system from Microsoft and Windows PC.

BioShock Infinite: Clash in the Clouds, developed by Irrational Games, is an action-focused downloadable content pack that presents players with a series of unique, intense challenges and a whole new gambit of combat opportunities. Players will combine a diverse toolset of weapons, Vigors, gear, Tears and Sky-Lines in four new areas inspired by the classic BioShock Infinite environments. In addition, by completing all 60 Blue Ribbon challenges, players will unlock exclusives in the Columbian Archeological Society, gaining access to new Voxophones, Kinetoscopes, concept art and more.

BioShock Infinite: Clash in the Clouds is available starting today for $4.99 (400 Microsoft Points on Xbox Live for Xbox 360) via online marketplaces on all available platforms, and is included in the BioShock Infinite Season Pass.

Also in development at Irrational Games, BioShock Infinite: Burial at Sea is a two-part add-on campaign featuring an all-new story for Booker and Elizabeth, set in the underwater city of Rapture before its fall. These two campaigns will be available individually for $15.00 (1200 Microsoft Points), and are also included as part of the BioShock Infinite Season Pass.

"We are really excited to offer our fans the content that they have been asking for," said Ken Levine, creative director of Irrational Games. "With Clash in the Clouds, people get a pure action experience that takes BioShock Infinite combat to its highest challenge and intensity level. With the Burial at Sea episodes, we are building a Rapture-based narrative experience that is almost entirely built from scratch."

The BioShock Infinite Season Pass is available now for $19.99 (1600 Microsoft Points) and includes all three pieces of add-on content, as well as the Early Bird Special Pack, which includes powerful weapon upgrades, exclusive gold weapon skins and infusion bottles to upgrade abilities.