What's been your rabbit hole of the week?

Rain World Modding

I already know C# so I thought it wouldn't be that difficult, but I was very wrong. Rain World is a game made with Unity, but the only part they use Unity for is rendering. And the game also doesn't ship with debug symbols. Doesn't help that the modding wiki is outdated at places and incomplete. Took a lot of guess work and looking at other mods to figure out what to do, but I got there at the end and learned a lot.