AssetStudio VS AssetStudio

Tile graphics are available as-is in the game folder (Shadowrun Hong Kong\SRHK_Data\StreamingAssets\ContentPacks etc). For the rest, use tools for ripping stuff from unity games - UABE, AssetStudio etc to open the resources.assets files.

https://github.com/AssetRipper/AssetRipper and https://github.com/Perfare/AssetStudio, depends on what you want. If yoy want to rip an entire scene or gameobjects/prefabs, use AssetRipper. Else if you just want sounds, models, animations (from FBX objects), textures, fonts and this kind of stuff, AssetStudio works

AssetStudio - let's you extract models, textures, sounds, etc. from the game's assetbundles (aka: the game's compressed / packed data). There's also this guide on other programs for Unity modding - less of a guide really, more for finding out what other tools there are.

Something like AssetStudio so I can extract music from Unity games. Wine works perfectly fine, though I'd rather have a native build of it.

https://github.com/Perfare/AssetStudio/releases/download/v0.16.47/AssetStudio.net472.v0.16.47.zip Here's the direct download link, just extract then run the .exe

You might want to try this one too, but I've never had to use any of these tools so I'm unaware of how successful they are when it comes to reconstructing assets, so search around for what works the best.

Sooo, P2 modding is not very well documented so far - what I know is that it's easy to replace things like textures and sounds using AssetStudio and UABE together. The dialogue and many of the gameplay files are in plaintext or XML, and can be edited freely (once you know what they do). Furthermore, you can use DNSpy to edit the .net files included with the game (this is how the published mod Bound Again added effects to items, IIRC).

So, first you'll need something like AssetStudioGUI (recommended, since it's being regularly updated) or UnityStudio.