Delta Labs - Level 2b: Union Aerospace Research Division

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Doom 3 maps
Mars City: Intro 1 2 3 Alpha Labs: 1 2 3 4 Enpro Communications: 1 2 Monorail/Recycling: 1 2 3 Delta Labs: 1 2a 2b 3 4 Hell Delta Complex Central Processing: 1 2 Excavation: 1 2 3 End

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.