In the speedruns for this game there is a glitch where you can glitch through doors by (at least from what I can tell from the speedruns) pausing the game, walking though the door in real life and then saving and then loading the game but I cannot do this when I try.

I don't know if I am doing something wrong or if its the more likely scenario where it has been patched and if so will the speedruns that are up now be taken down?

Edit: I was correct the glitch has been patched however, there is a way to access a older version of the game very easily, you just need to go to the game on steam click the gear icon and go to properties then go to the beta tab and then choose which beta you want to opt into which is the legacy version.

I don't know if speedrunning a older version of the game is allowed but there should probably be a separate category for the older and up to date versions.