I'll be going over the progress and guide to modding in Outlast Trials. This is a work in progress and I was helped by a few great people.
kboykboy and hypermetric
Tools that you must have:
- Packing (paking)
Outlast Trials uses a specific version for paking "V11", and that using Unrealpak or regular Repak doesn't work and will not appear in-game when you use these tools to package your mod.That is why you should use "Repak" by Truman: https://github.com/trumank/repak/compare/master...patch-outlast-trials, which is an edited Repak exe specifically for Outlast Trials. DOWNLOAD
OR easily download here in NexusMods: https://www.nexusmods.com/theoutlasttrials/mods/31
2. Fmodel
You need Fmodel to access the game files https://fmodel.app/
Once downloaded you have to set your settings, your game path, like this when you open up Fmodel.
Here you get to access the files.