Gabriel Knight 3 is one of my all time favourite games, so as you can imagine it's heartbreaking seeing the state of complete neglect it is drowned on by everyone responsible. This is an old game, it went through a development hell at the time so much of the tech behind it is completely outdated, so running it nowadays is a challenge. As a matter of fact, nowadays it's impossible to run it if you don't mess with it as It asks for a CD when you first boot it up! That's only the first of many issues unfortunatly, but it's telling of how the publisher simply ignores it and doesn't offer the simpliest of support.

Unfortunatly, nowadays this is not a popular game, so I'm afraid it will become close to unplayable in the future. I'm no tech savvy so the support I can do is minimal. This guide is just a compilation of fixes I found scatered on the web and all the praise have to be directed the real heroes that managed to create and share these fixes, I'm just a compiler :)

Edit: I bought a Deck and to be quite honest the game runs quite well there and it's easier to setup to a point I'll recommend playing there instead of a full blown desktop. Just follow this guide by user noam.mor: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3248920963