Alpha Labs - Sector 4: Union Aerospace Science 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

Alpha Labs - Sector 4: Union Aerospace Science Division is the eighth level of Doom 3. This sector seals and prepares shipments of processed hydrogen fuel for dropship distribution to UAC bases and subspace platforms. The system is fully automated and personnel access is limited due to open machinery hazards.

The player must navigate either the EFR or extend the service bridges. The EFR activates various moving platforms throughout the level, while the service bridges provide a quick but dark crossing. At the end of the level the Vagary (first boss) appears.

The level also includes the infamous "they took my baby" sequence.