DOOM 64 100% guide

1. Start a normal new game on Staging Area. Find a secret and destroy all ten barrels to reach the hidden level Hectic.
2. Use passwords to load The Lair, No Escape, The Absolution and Cat and Mouse, earning one or two achievements each.
3. Load the Final Judgement password and finish the Lost Levels.

A normal campaign playthrough alone does not earn everything. The Fun levels can only be reached by password or the Features menu, and Escape Artist needs a Watch Me Die! run. The password route is the standard one.

• Controls: A is Use (doors, switches and wall panels), RT fires, and LB/RB cycle weapons.
• Entering passwords: On the main menu, open Options and choose Password. Enter all 16 characters exactly as written; the spaces are only there for readability. Each password sets your level, skill and loadout.
• Saving: You can save at any time from the pause menu, and a save keeps the exact state of the level. Save before each boss or key pickup as a precaution.
• Features menu: Any Staging Area password, or completing Hectic through its alternate exit, unlocks the Features menu in the pause menu. This guide's main route doesn't need it at all. If you ever use it, use it only to warp. Warping is reported not to disable achievements. Every other Features option (invulnerability, weapons, health, ammo and similar) disables them for the rest of that session, so if you touch one by accident, close and restart the game, then reload your password before continuing.
• Weapon pickups: Weapons you start with from a password do not count as found. The two weapon achievements need you to physically pick up the weapon in the level.

Hectic is a hidden level. A password can load it directly, but that doesn't count for its achievement: you have to find the secret entrance in Staging Area (MAP01). You open its teleporter by destroying all ten explosive barrels in the level. Two of them are inside secret areas, so the barrel hunt also earns Secret Sleuth along the way.

The ten barrels:

1. The lower start area you drop into, next to the backpack.
2. The room with a ledge holding boxes of bullets, up the stairs and along the conveyor.
3. The maze, just after the lift. Turn around at the top.
4. A secret room in the lift room, behind the hidden wall panel without circles in the northwest corner. The room also holds armor. On Be Gentle!, the blue key is in plain sight near a switch in the upper part of the maze; grab it now for the blue door.
5. The room past the blue door.
6. Under the soulsphere pillar. Cross the gap to the switch beside it and press it. The pillar lowers for only a short time, so step into the lowered recess before it rises, then ride it up to the soulsphere. Take the soulsphere, then shoot the switch behind it to drop down to the barrel. A teleporter there takes you back up to the start ledge.
7. The large room opened by a wall switch.
8. The small yellow-outlined room full of health bonuses. Step inside and the floor drops, revealing the barrel.
9. Inside the regular exit room. Don't press the exit switch, or the level ends and the barrel hunt resets.
10. The raised start ledge where you began the level. Leave this one for last.

The order above is a sensible route, but any order works as long as the start-ledge barrel is last.

The teleporter to Hectic is in the Berserk-pack room, through the door directly behind where you start the level. When the tenth barrel explodes, a booth in that room's wall opens for only about five seconds, and only once per game.

• Open the door to the Berserk room first. Shoot the last barrel from the doorway through the wire mesh, then run left into the booth.
• Save just before you shoot the last barrel. If you miss the window, reload that save and try again.

Password: V87L 7C28 BDT1 59VB

This loads MAP30 The Lair on Be Gentle! with full health, armor and weapons, and two of the three Demon Keys already in your inventory. You only need to pick up the third key from this level.

The Demon Key sits on top of a tall pillar in the level's large central chamber. You start in a locked room, so the first job is getting there:

1. Open either side door in the starting room and work around the side rooms that circle behind the starting area, killing the Imps and Lost Souls on the way. Pick up the blue skull key there.
2. Return to the starting room and unlock the blue door.
3. Kill the Spectre behind it, then press Use on the distinct middle wall panel to reveal a staircase.
4. Downstairs, press the demonic face panel and then the switch it exposes. Go through the route that opens and kill the Hell Knights to reach the central pillar room.
5. In the pillar room, press the wall switch between the two side-by-side doorways. This raises three stairways along the room's walls.
6. Climb the center stairway and turn left into the small curved room. Stepping inside briefly reveals the first switch on the far wall of the large central room, high up and just right of the right-hand doorway. You see it through the curved room's wide window. Shoot it with the pistol, shotgun or chaingun. If you miss it, step out and back in to reveal it again.
7. Right away, turn and look through the small windows beside the stairway. A second switch briefly appears on the far wall of the curved room across from you. Shoot it quickly, before it hides again, and the pillar lowers so you can grab the key.

If the second switch doesn't appear, shoot the first one again. You don't need to finish the level once the achievement unlocks.

Password: YWW4 7HVD BCLG RKVB

This loads MAP24 No Escape on Watch Me Die! with 200% health and armor, every weapon, full ammo and all three Demon Keys. The Unmaker is fully powered. No Escape has no exit switch. The level ends automatically once the two caged Cyberdemons are dead. On Watch Me Die! a third Cyberdemon is already loose when you arrive. You don't have to kill it, but it will harass you while you work on the caged pair.

• If the loose Cyberdemon gets in your way, kill it with the fully powered Unmaker or the BFG9000. Otherwise, avoid it and focus on the cages.
• The two caged Cyberdemons are the ones that matter. They are in the large barred cage in the main courtyard. Clear any nearby attackers first, then stand in front of the cage and fire through the gaps. The safest way to kill them is with bullet weapons (shotgun, super shotgun or chaingun), because projectiles like rockets can hit the bars instead. Players have also reported success firing the fully powered Unmaker through the bars, which is much faster, but it isn't guaranteed. Alternatively, use the level's switches to release them into the open and fight them there.
• The tops of the outdoor elevators give you height that can help you avoid rockets, but splash damage can still reach you, so don't treat them as completely safe.
• Save after each Cyberdemon kill.

Password: W83M 7H20 BDY0 N9VB

This loads MAP28 The Absolution, the last map of the main campaign, on Be Gentle!. You start with 200% health and armor, all weapons, a backpack, full ammo and all three Demon Keys. The keys operate three Demon Key plates that close the monster-spawning portals, which lets you skip most of the monster waves before the Mother Demon. W93M 7H20 BCY0 PSVB is an alternative "super status" password for the same level.

Do the two weapon pickups below first, because the start-room door can't be reopened once you leave and the level ends the moment the Mother Demon dies. Then head for the courtyard.

The plates only matter once the courtyard encounter has started, so trigger it first (see Mother May I? below). If a plate still won't respond after monsters are spawning, go back to the main menu, enter the password again and play the level without repeating the weapon pickups. A second load has fixed this for some players. You can collect both weapons later in Final Judgement instead.

Password: YRXM 7HVC BCMZ FJVB

This loads MAP25 Cat and Mouse, one of the "Fun" levels, on Be Gentle! with maximum health, armor, weapons and ammo. Fun levels can't be reached through normal play, so a password or a Features warp is the only way in. Using the password avoids the Features menu altogether. It is generally considered the easiest Fun level.

Final Judgement's boss, the Sister Resurrector, is released from behind a barred gate to the north. She fights much like the Mother Demon.

• If either weapon achievement is still locked, deal with it first. You start with full cell ammo, so fire enough energy ammo to make room, then walk over the BFG9000 and Unmaker pickups in the starting room.
• Press the starting switch to open the way out, then head north to the gate.
• Because you already hold all three Demon Keys, press the three colored switches to lower the gate's bars, then press the final switch to wake the boss.
• Save before pressing the final switch. Once you press it, she can teleport to the opposite end of the map, so turn around and head back south to find and fight her. Kill her with the fully powered Unmaker or the BFG9000.