DOOM 64
10 Achievements
1,000
1-2h
Mother May I?
Defeat the Mother of All Demons on The Absolution
150
7.55%
How to unlock the Mother May I? achievement in DOOM 64 - Definitive Guide
W83M 7H20 BDY0 N9VB
This spawns you on the last level on easy with max weapons and stuff. I found the easiest way to get this was by just rushing the boss, otherwise her homing rockets killed me. Here's the method I used.
1. Press until you get to the last weapon. This weapon is called the Unmaker.
2. Collect the Invulnerability Orb (The green one on the right)
3. Go to the door and open it by pressing
4. Run to the centre. This makes all the enemies spawn. Now you need to stop the enemies as fast as possible so that the boss spawns. You do this by.....
5. Press the 3 switches around the outside (with ). Each switch closes the door where the enemies spawned. Some will always get out., but if you do this, you should have some invulnerability left.
6. Kill the remaining enemies as fast as possible so that the boss spawns in the centre.
7. Run right up to the boss in the centre and keep hitting her until she dies. If you did step 5 and 6 quick enough, you should have lots of ammo/armour/health left to be able to do this.
Here's a video of me doing it.
Hope this helps.
Mother of all Demons - 8:00
Achievement Walkthrough - Quick/Easy Method:
From the main menu, select 'Options' then 'Password'. Type in W93M 7H20 BCY0 PSVB. You will spawn on 'MAP28: The Absolution' on 'Be Gentle' difficulty with 100 Health, 200 Armor, all weapons and full ammo. It also spawns you with all three Demon Keys.
When the level starts, keep pressing until you get to the last weapon, the Unmaker. This is the game's most powerful weapon and uses energy cell ammo (like the Plasma Gun and BFG9000). Next, pick up the green Invulnerability sphere in the right alcove facing the exit door (you can also pick up the white Mega Sphere on the left to max out your health to 200). Open the door and head directly for the larger structure to your left or right. Behind the structure there is a colored switch that closes the door to the larger structure in front of it. Interact with each of the three switches (in a half circle around the center structure) so there are less enemies to deal with. Use the Unmaker to dispatch them quickly.
When all the enemies are defeated, the center structure will open and the Mother Demon will appear. You may still have some Invulnerability left. If not, don't worry; you should still have plenty of ammo for the Unmaker (she takes about 250-300 ammo to kill). Get as close to her as you are comfortable with and unload a barrage on her, strafing as needed, and she should die relatively quickly. When she does, the achievement will unlock.
Thanks to WhiteshirtGames for the video:
The Mother of All Demons is the final boss you will come up against at the end of Level 28 'The Absolution', the final level of the main game. Use password "W83M 7H20 BDY0 N9VB" to start Level 28 with all weapons, full ammo and on the easiest difficulty. This will put you in a great position to breeze through this level.
When the level begins, enter the arena and enemies will start spawning from the 3 brick archways at the back. You must activate the 3 colored plates that are around the outside of the arena to deactivate the portals the enemies are spawning from. Once all portals are deactivated and all enemies are killed the central area will open up revealing The Mother of All Demons. It is best to use the Unmaker for the entire level, if you use it sparingly you will have enough ammo to kill everything. Once The Mother of All Demons is dead the level ends and the trophy will unlock.
The starting area of level 28 is also a great place to get My Cause is Just, My Will is Strong and Unholy Firepower if you haven't already. Both the BFG9000 and the Unmaker are available for pick up in this room. If you use the above password you will spawn with both the BFG9000 and the Unmaker already in your inventory however this will not unlock the trophy as you must actually pick them up for the trophy to pop. Fire a few shots of either of these weapons when you first spawn to drop your ammo below full to enable you to pick up the weapons that are on the ground.
Below is a video showing a playthrough of Level 28 'The Absolution':