"Call of Duty: Black Ops" can be played online on the Playstation 3 system, the Xbox 360 system and on the PC. Playing online on the Playstation 3 and the PC is free; however, playing online on the Xbox 360 requires an online subscription.
"Call of Duty: Black Ops" has two playable options online: Multiplayer and Zombies. In the Multiplayer option, players can join online matches consisting of two teams that fight each other in various game types. In the Zombies options, a player joins an online game with a maximum of three others that play together to defeat various levels of zombie hoards.