Portal Test Chamber 00/cs

Tato Testovací komora je první level hry, a představí hráči GLaDOS, Portals, Weighted Storage Cube,  Chamberlock a taky materiální obvozovací rošt.

Hazards

 * Cube Hazard

Bugs

 * In the second room, it is possible to soft-lock the game by using the Weighted Storage Cube to crouch jump onto the door indicator. The player can then place the Weighted Storage Cube onto the Security Camera above the door. Once the player is back on the ground, the player is unable to proceed as the Weighted Storage Cube is inaccessible and is needed to open the door.