Quake II

Ground Zero is the second mission pack for Quake II, released in 1998. It features 15 campaign levels and 14 deathmatch maps. For this achievement, you do not need to play the entire campaign (but can if you choose). Since this release has a level skip, you can skip to the last Unit and still get the achievement. Here’s how:

Select Single Player
Select Level Select
Then choose:
- Episode: Ground Zero
- Map: Unit 5 - Boss
- Difficulty: Easy

Move forward through the level and drop down a shaft. Here you will face the Black Widow Guardian boss. She is by far the toughest boss in all of Quake II. She’ll appear in two forms; first as a mechanized humanoid. When she is defeated, she teleports away and reappears in the form of a giant mechanized spider. Both forms have the ability to summon Stalkers.

Once the boss is finally defeated and have dispatched all of the summoned Stalkers, you will not have to face any more enemies in the level. The final objective is to plant an anti-matter bomb at the gravity well to destroy it. Use then to activate the compass to show you where to deactivate the force fields to ascend into the gravity well chamber. Once you plant the bomb, backtrack to entrance area (where you took the lift up after defeating the boss) and enter the transport pod in the right-hand tube. This will end the level and unlock the achievement.

If you need visual assistance, refer to this video by UntilTammaroYT at [1:56:33].