Uploaded October 2008 | Updated September 2026, 1 week ago
NOTE: I don't care if you just got spoiled, it's your fault for looking at this video to begin with. Also, THIS IS NOT THE ENDING.
After beating Test Chamber 18, a delayed party, letting go of the Portal Gun, the main character is invited to observe the activation of a new A.I designed to streamline the activities in the Aperture Science Laboratories.
This is from Portal: Prelude, a mod for the Source Engine, based on Portal. It is not official, and should not be considered official unless you really believe in plotholes.
NOTE: I don't care if you just got spoiled, it's your fault for looking at this video to begin with. Also, THIS IS NOT THE ENDING.
After beating Test Chamber 18, a delayed party, letting go of the Portal Gun, the main character is invited to observe the activation of a new A.I designed to streamline the activities in the Aperture Science Laboratories.
This is from Portal: Prelude, a mod for the Source Engine, based on Portal. It is not official, and should not be considered official unless you really believe in plotholes.
