Hello people, I have this problem, I can't launch this game, it worked well yesterday morning and later that day it didn't work at all, like It's starting to load start menu, but stops around 60%, don't know what to do or what's happening, is it on my end or is it on game's end? Or both ends doesn't work, because other games work but not this one.

No, you are not the only one:

https://steamcommunity.com/app/1184370/discussions/0/3044985412476988606/

Would you do me a favour and updating the unity driver and then test again? (and give feedback, if this works?)

Owlgames already wrote about it:

https://steamcommunity.com/app/1184370/discussions/0/3044984779770093394/

and try this:

"1. My game freezes on 9X% during loading.
• Status: Known issue | We are working on it | PC: Fixed | MacOS: Working on it
• Reason: Issue with Intel iGPU
• Tips how to fix it:
• Disable iGPU
• Both GPU drivers update"

What now? I'm afraid to fuck up something I have no idea how to revert. Same with iGPU

Why would you want to revert an update? If some drivers of yours needs update it is most likely the reason for the issue.

Hmm. Good question. But updating is not updating. I mean, i had it a few times, when i updated windows (both 7 and 10) even as there was no need and afterwards something was not working anymore. Then i had to reinstall the whole system, which was then without this "new" patch.

In general, backup your saves.
They are in

c: users : [username] : appdata : locallow : owlcat games : Pathfinder wrath : saved games

Then you can do all the testing you want. In general patching the mentioned things should help solving the issue. But if not, it can not work in a worse way. At least this is my opinion.