File:Quake II Torture Chambers Iron Maiden.png

From Quake II, PC version, in the Quake_II/Torture Chambers/Torture Chambers level, you'll find a Marine about to be squashed in an iron maiden-like device. Either let the Guards do it, press the button under the computer screen yourself or just shoot him. As he dies, he will throw out a Security Pass, which you need to continue the game.