Complete Doom II Map 16 Suburbs walkthrough, including finding the Blue Skull Keycard and all four secrets.
Walkthrough
- 1Immediately turn around to face and kill the Imps. Collect the Chaingun to your left.
- 2Deal with the Revenants to the north; rockets are effective, but it's best to do so from outside after clearing immediate threats.
- 3To the east, eliminate the lone Revenant. To the west, use your Plasma Gun or BFG to quickly defeat the Arch-Vile.
- 4Explore the southern building. Enter the large door on the south side to find it filled with Imps; a BFG shot is recommended. Collect the health inside if needed.
- 5Go through the smaller door. Kill the Cacodemon ahead.
- 6Activate the red torch to raise the ceiling. Lower the counter below it, stand on it, and when it raises, shoot the eyes on the wall to unlock [SECRET 1/4], which contains ammo and a Backpack.
- 7Lower the table with shotgun shells. Ride it back up and fire your pistol at the red flame object to unlock [SECRET 2/4] and obtain a Megasphere. Grab it before leaving the map.
- 8Head south through the small opening and snipe the Imps on the wooden structure.
- 9To the north of the Imps, use rockets to kill the group of three Revenants, leading them to the opening to avoid their rockets.
- 10Kill the slow-moving Mancubus that follows the Revenants. Explore their cubby for ammo and a Partial Invisibility Orb.
- 11In the cubby to the north, defeat the Arch-Vile and three Cacodemons using rockets, BFG, or Plasma Gun. Collect the ammo and Invulnerability Orb inside. Save this orb for later.
- 12Head north and use the walls to take pot-shots with your Super Shotgun (SSG) at the two Mancubi on smaller structures. The first structure has a Supercharge Item, and the second has a box of shells.
- 13Return to the toxic waste pit, ensure Imps are dead, and take the stairs up to find a Radiation Suit, multiple boxes of rockets, and the Blue Skull Keycard.
- 14As soon as you grab the Blue Skull Keycard, a large number of enemies (Cacodemons, Imps, Mancubi) will teleport in. Run past the two cubby areas to the north and let them engage in infighting. Lead any pursuing Imps to the north and kill them with your shotgun if they don't fight other demons.
- 15After about 35-45 seconds, grab the Invulnerability Orb you saved. Wade into the infighting enemies and use your Super Shotgun or BFG shots to clear them out.
- 16Go to the Red Brick building on the eastern side of the map. Head to the east side and open the door. Step inside to trigger [SECRET 3/4]. Kill the three Cacodemons within.
- 17Lower the northern wall in the Red Brick building to find and quickly kill a Revenant. Ride the wall upwards.
- 18To the south, kill another Revenant from a distance near the blood pool. Head over to the ledge, drop in, and hit a skull switch to open another secret room, counting as [SECRET 4/4].
- 19Inside this final secret room, collect the BFG 9000 and its associated ammo.
Tips
- Use the walls to avoid enemy projectiles, especially from Revenants.
- The Arch-Vile is a high-priority target; use your most powerful weapons to eliminate it quickly.
- Save the Invulnerability Orb for the large enemy engagement after collecting the Blue Skull Keycard.
- The BFG 9000 is extremely effective against large groups of enemies.
- The Super Shotgun is excellent for close-quarters combat during the mass enemy encounter.
- Secret 1: Ammo, Backpack
- Secret 2: Megasphere
- Secret 3: Triggered by entering the Red Brick building
- Secret 4: BFG 9000, Ammo
- Key Items: Blue Skull Keycard, Radiation Suit
- Power-ups: Partial Invulnerability Orb, Invulnerability Orb, Supercharge Item
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