PLAT1 is a Single Player level. There is no in-game name for this level, nor is a name included with the documentation. This level is therefore named after the filename.
This level is intended to be a test map for a Moving Platform. The Moving Platform moves from one end of the map to the opposite side in a "L" shaped corridor filled with Lava.
Walkthrough
Wait for the Moving Platform to return, then step forward onto the Moving Platform without falling into the Lava below. Wait for the Moving Platform to reach the opposite side, then turn right and leave the Moving Platform.
Gallery
PLAT1
Alternate Versions
Aftershock for Quake version using the Aftershock Level Theme.
PLAT1 (Aftershock)