All the in-engine progress I have up to this point. Development is shifting to the planning phase, and I'm probably going to continue in Unity once The Stanley Parable Ultra Deluxe releases.
STEAM INSTALLATION INSTRUCTIONS:
Before you begin: If you want to make a backup of your Stanley Parable folder,
I'd recommend you do that beforehand. This mod hasn't caused me any problems
whatsoever, but just in case.
Navigate to your Stanley Parable folder, usually located at:
D:\Program Files (x86)\Steam\steamapps\common\The Stanley Parable\thestanleyparable
Paste the folder named 'TSPR models' here.
Open the 'maps' folder, and paste the 'industrial.bsp' file here.
To play the map, enable the console (there are plenty of tutorials on this online)
and type in "map industrial" without the quotes.