This is a guide for the The Hot And Winding Road achievement. Find the secret exit in Quake Episode 3: The Netherworld.
How to Obtain The Hot and Winding Road Achievement
Level: E3M4: Satan’s Dark Delight
Go to the moving platform on the right to activate the one on the left.
This activates the platform on the left from the first screenshot.
Look to the left at the bottom of the stairs
Jump into the pit and you are done!