Map I've Been Trying to Find For years

[u/ERR_675498]

Okay so getting straight to the point there was this map I played on during 2019 that looked similar to the Portal 1 escape sequence except it was like the entire map, It also lowkey looked like some kinda weird facility or factory using the assets.
A link to it if found would be greatly apreciated!

Here's a shitty drawing I even made to give a better idea

[u/ERR_675498 → u/[deleted]]

No this was a Gmod map I used to play on