Portal Prelude - GLaDOS’ Activation

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 y