A new save glitch method has recently been discovered by the Portal speedrunning community and has now resulted in one speedrunner completing the game without using the portal gun at all. The glitch allowed players to travel through walls by saving the game and reloading the save as quickly as possible. This in turn allows players to bypass walls and levels in its entirety.
Speedrunner Icy managed to complete the game using this method in just 48 minutes 57 seconds. You can view the legendary run in its entirety down below..
https://youtu.be/WKeXONqU0gE
