Sergeant Wallcroft is a SAS soldier who served alongside Soap, Price, and Gaz during the events of Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare Remastered, primarily on the first two missions, "F.N.G." and "Crew Expendable". He later appears in Call of Duty: Modern Warfare 3 on the mission "Mind the Gap" alongside player-character Marcus Burns, and also appears in Call of Duty: Heroes. He is the Team Announcer of the SAS in the Multiplayer mode for Modern Warfare 3.