Delta Labs - Level 2b: Union Aerospace Research Division

Delta Labs - Level 2b: Union Aerospace Research Division is the seventeenth level of Doom 3. Arch-Viles begin to show up with their haunting cackles and screeches. Only one needs to be killed; if the player does not kill the other Archviles, it seems as if they are being antagonized by a single villianous Archvile. This is where Elizabeth McNeil's office is; fortunatly she escaped before the invasion occured.