NewWorldUnpacker VS DepotDownloader

There are unpackers available like https://github.com/new-world-tools/new-world-tools or https://github.com/MontagueM/NewWorldUnpacker) that are able to extract the datasheets containing the loot tables.

First of all, you need to unpack game I would recommend you to start research from there https://github.com/MontagueM/NewWorldUnpacker

They're not encrypted, just zipped. You can unzip them with this.

The PAK files are huge zip files using Oodle compression Here are two extractors that can handle that: (ts) NSBL/pak-extract and (py) MontagueM/NewWorldUnpacker

There's also DepotDownloader that lets you download anything, including past version, from Steam https://github.com/SteamRE/DepotDownloader

I use this to download historical versions of a game to help with reverse engineering to archive dialogue trees from a game https://dialogue.destiny.report

I'm not sure how you could just download the launcher. You want the Launcher.exe from this version. A quick google brought up this downloader: https://github.com/SteamRE/DepotDownloader

Steam Depot Downloader (requires DotNet)

Continuing to add to the confusion on the topic by trying to argue that Steam is DRM because you have to buy the game through Steam is counter-productive. (And apparently Steam's client isn't the only browser available.)

Not by Steam means. I don't know if it's still functional (update on last year) but https://github.com/SteamRE/DepotDownloader is what you're looking for and you need to learn the DLCs depot number from SteamDB to feed that information into this program.

use this https://github.com/SteamRE/DepotDownloader

If you are looking for a specific version of the game and you own it on steam you could download it using something like DepotDownloader. An example of this would be downloading the first pubic version of the game

You can still rollback with the help of the DepotDownloader: https://github.com/SteamRE/DepotDownloader