I’m thinking for games like RuneScape/old school RuneScape where there are multiple private servers, World of Warcraft, BattleForged (Skylord reborn) etc.
From my understanding the user’s only have access to a downloadable client that they use to connect to the main game server, do people reverse engineer a server with all the server side logic?
In: 9
That’s it entirely. Some games it’s easier than others depending on complexity and if it’s obfuscated or not but basically some programmer sniffs traffic, reverse engineers it, maybe reverse engineers some of the client side code as well and writes an emulator.
Modders can go pretty hard at this type of thing, and for relatively popular stuff there’s several people working together and publishing code and resources.
See here for RuneScape stuff for example:
https://github.com/topics/rsps
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