The Twillits SpikeWall from The QuakeLab or Cthon's Crusher is a Single Player level.
Walkthrough
Above you is a Shootable Button, while to your left is a set of Bars that opens when you hit the Button, shoot this to allow access to the empty side room. Continue down the corridor to collect the Rocket Launcher at the far side, doing such shall trigger the Large Wall Spike beside it to begin moving up and down the corridor. Use the empty side room to evade the Large Wall Spike.
Gallery
The Twillits SpikeWall from The QuakeLab
Trivia
- This level is inspired by a similar Large Wall Spike corridor in E1M6: The Door to Chthon (below the Silver Key balcony). The alternate title for the level, Cthon's (misspelling of Chthon) Crusher, is a reference to this.
- It is likely that the word "Twillits" refers to Tim Willits, one of the level designers for Quake, who might have been incorrectly credited for E1M6: The Door to Chthon. The correct level designer would be American McGee.