Testing mechanics are what make up the meat of the puzzles in the Portal series. The different devices, structures, cubes, gels, and hazards are placed strategically around the test chambers.
Devices
Structures
Cubes
Main article: Cubes
Buttons
Gels
Main article: Gels
Hazards
Tubes
Main article: Tubes
Scrapped
Main article: Unused content
- Glass Futbol
- Exploding Futbol
- Futbol Spawner
- Futbol Receptacle
- Adhesion Gel
- Reflection Gel
- Hover Turret
- Paint Gun