I'd rather not post invite links here directly out of concern for spamming, but I can leave some easy-to-follow breadcrumbs.

The decomp.me Discord server invite link can be readily found on that website and in the README of its GitHub repository. It's the closest thing to a central hub of the decompilation community. You can find some invite links in its chat history by searching for "discord.gg" (including the servers listed below).

Some of these Discord servers have a #other-servers or #related-servers channel with tons of invite links to other similar Discord servers. In particular, these servers have those channels:

- PS1/PS2 Decompilation

- GC/Wii Decompilation

That way, you should be able to find dozens and dozens of Discord servers on that topic. There are still many more out there (I've joined at least six others that aren't directly reachable from the invite links inside the servers I've mentioned).

There are also other Discord servers about reverse-engineering that can contain discussions about decompilation techniques or projects.

HN isn't a good place to share Discord invite links. I'd recommend putting an email address (or something) in your bio – ideally one you don't mind getting spammed – so people can send such things to you semi-privately.