Doom 3: Resurrection of Evil is the official expansion pack for Doom 3 and was released by id Software in 2005. In 2147, two years after the events of Doom 3, the UAC detects a strange signal from one of its Martian satellites, and consequently sends a team in to investigate. After this team finds an Artifact and the forces of Hell are alerted and begin a new invasion. The player, a marine combat engineer who discovers the hellish device, must fight his way through the base to reach the doctor, chased by demons. McNeil, an unseen character in Doom 3, was the whistleblower who notified counselor Elliot Swann and Jack Campbell of Malcolm Betruger's mysterious activities at the beginning of Doom 3.

The marine eventually finds her, and she tasks him with stopping the invasion by returning the Artifact to hell. In his journeys he defeats the three Hell Hunters (demons who were supposed to find the Artifact) and absorbs their powers into the ancient device.