A feature-limited version developed by Beenox and Mercenary Technology that only supports multiplayer modes was released on PlayStation 3 and Xbox and was also the final Call of Duty title released on those platforms. Similar to its predecessors, the story follows a group of black ops soldiers. The game's campaign is designed to support 4-player cooperative gameplay , allowing for bigger, more open level design and less corridor shooting. As the player character is cybernetically enhanced, players have access to various special activities. The game also features a standalone Zombies campaign mode, and a "Nightmares" mode which replaces all enemies as zombies. Announced on April 26, , the game is the first Call of Duty video game released after Activision parted with Microsoft Studios and partnered with Sony Computer Entertainment , which secured the timed exclusivity of the game's downloadable content.