Ian Sinclair

Ian Sinclair is a character in Doom 3. He is a scientist working encountered in the Mars City Underground, having special access to the area. Because of the hallucinations experienced by many workers and rumors of Mars City Underground being haunted, Ian Sinclair is jumpy in his job. He is encountered at the beginning of the game, when the player is assigned to find Doctor Jonathan Ishii. Sinclair remarks that the energy levels in many machines were 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.