Ian Sinclair

Ian Sinclair was a scientist working in the Mars City Underground during the events of Doom 3. Because of the hallucinations experienced by many workers and rumors of Mars City Underground being haunted, Ian Sinclair was jumpy during his job. He is encountered at the beginning of the game, when the player is assigned to find Doctor Jonathan Ishii. After expressing annoyance at the player for "sneaking up" on him, Sinclair remarks that the energy levels in many machines are going out of control. However, he does not have time to report this before the demon invasion. When the player returns to Sinclair's location, Sinclair has been transformed into a zombie, forcing the player to kill him.