Modding
From Against the Storm Official Wiki
The modding community can be found on the official Against the Storm Discord server and the unofficial Against the Storm Modding Discord server.
For viewing and extracting game files: https://github.com/Perfare/AssetStudio
Game code can be inspected by opening Against the Storm_Data\Managed\Assembly-CSharp.dll in dnSpy or another assembly editor.
Plugin loader BepInEx can be used with HarmonyX to patch methods at runtime.
See Josiwe's Tutorial for a basic primer.