Chasm: The Rift

The first level you can attain this is on MAP11: Subterranean Horror. After opening the silver key gate, you’ll see the Mega Destroyer above you on a ledge. Ignore it for now, though. Progress through the level, collecting the golden key and weaving your way on back to the golden key door with the switch in front of it. Hit the switch, then turn left and head through the hallway, then turn left. The wooden gate blocking the Mega Destroyer has been lowered. Hop up to it and this will pop.

If you miss this one, there are multiple others through the campaign, including one on MAP18 that is located in the perfect spot for a different achievement.