Alpha Labs - Sector 4: Union Aerospace Science Division

Alpha Labs - Sector 4: Union Aerospace Science Division is the eighth level of Doom 3. The player must navigate either the EFR or the bridge. At the EFR, the player must jump gaps and will miss the plasma gun. If the player takes the bridge, it is possible to get the plasma gun, but a swarm of monsters attacks upon picking it up. The level also includes the infamous "they took my baby" sequence. At the end of the level the Vagary (first boss) appears.