Portal 2 PeTI - "Time Mishap" by Anachronistic ALLOS
Channel: LB
Date: 03/01/2016

https://steamcommunity.com/sharedfiles/filedetails/?id=131815241
Retro playthrough. Apparently you have to do everything in EXACTLY the right order.

This video is also on Twitch: https://www.twitch.tv/lb___/v/104906730