Erebus - Level 5: Erebus Research

Erebus - Level 5: Erebus Research is the fifth level of Doom 3: Resurrection of Evil. The player receives the chaingun, and uses an environmental suit to navigate a toxic sewer.

The player puts on the enviro-suit during a cutscene. This enviro-suit, besides providing protection from the toxic waste, also gives the player one free session of time dilation. The enviro-suit's protection may be renewed by killing Bio-Suit Zombies and taking their tanks; the time dilation, of course, by using the Artifact.

PDAs

 * Sean Gibson
 * Leo Avery

Characters

 * Dr. Cloud
 * Elizabeth McNeil

Enemies

 * Former Humans
 * Skinny Zombies
 * Maintance Zombies
 * Bio-Suit Zombies
 * Demons
 * Imps
 * Vulgars
 * Cherubs
 * Maggots
 * Mancubi

Weapons/Items

 * Grenades
 * Chainguns
 * Medkits
 * Armor Shards
 * Security Armor
 * Bullets
 * Clips
 * Shells
 * Keycard
 * Ammo Belts
 * Enviro Tanks

Cabinet Codes
None

Trivia

 * In Doom 3 BFG Edition, the helmet is removed at the sewer entrance, and the player can now enter the sewer without suffocating. In addition, Bio-Suit Zombies no longer drop tanks when killed.
 * After this level, Imps do not appear again until Hell.