Create-A-Class is not available in System Link. Killstreaks from the Multiplayer Mode will be accessible in Special Ops (UAV, Airstrikers etc), as well as a number of vehicles, including tanks, helicopters. It is also possible to have up to 16 players on a single map, so larger maps are more likely to be used. System Link multiplayer is the same as splitscreen other than there being multiple consoles and screens, making this a preferred way to play for tournaments or parties. Community content is available under CC-BY-SA unless otherwise noted. It allows the player to play against up to three players in most of the campaign levels to see who can get the highest amount of points. This usually involves and local network, or consoles connected through cables. Competitive Co-Op is a game mode in Call of Duty: World at War in the campaign.

System Link is the connection of multiple consoles through a Local Area Network, or LAN. There are only preset classes in Splitscreen.

Developed in partnership between Treyarch and Beenox, Call of Duty®: Black Ops 4 will be the most robust, refined, and customizable PC shooter experience we’ve ever created. In Splitscreen, all players are viewing their character on the same TV screen, hence the name 'splitscreen'. For the first time, Call of Duty®: Black Ops 4 is coming to Blizzard in a fully-optimized for PC experience and fully integrated into social features. However, only people on that console my play against each other, so it's usually best to have a smaller map to play in. In this multiplayer version, all the modes in online multiplayer are available to the users. There is a local multiplayer feature known as splitscreen.

In either type of match, up to 16 players are supported. Public matches connect you to anyone to play against, where private matches are invitation only and often have custom rules. In addition, matches can be public or private. Their are different modes available, and these can be found in the corresponding playlists.

The Online multiplayer connects you to opponents around the world to play against.

Call of duty 4 co op