The Quadroom is a Single Player level. There is no in-game name for this level, the name comes from documentation included with the level.
Walkthrough
Proceed forward to have 4 Movable Walls open and move towards the corners of the room. Drop into the hole straight ahead to reach the Water below.
Gallery
The Quadroom
Alternate Versions
Aftershock for Quake version using the Aftershock Level Theme.
The Quadroom (Aftershock)