It is obtained after re-visiting Saving Esmerelda. Once activated, the screen is divided into two identical halves during gameplay, also covering menu overlays (such as weapon selection and health monitors). If the player crosses their eyes, the screen will appear 3D. It is not recommended to do this for long periods of time, however.
- According to the Fur Fighters Strategy Guide, the cheat was known at one stage as Paul's 3D.