Call of Duty:Modern Warfare 2

Official content available through Steam only.

Call of Duty:Black Ops

Official content available through Steam only.

Call of Duty:Modern Warfare 3

Official content available through Steam only.

Call of Duty:Black Ops 2

Official content available through Steam only.

Call of Duty:Ghosts

Official content available through Steam only.

Call of Duty:Advanced Warfare

Official content available through Steam only.

Call of Duty:Black Ops 3

Official content available through Steam only.

Possibly custom content when mapping & modding tools are released?