There are 7 repositories under online-game-hacking topic.
A curated list of tutorials/resources for hacking online games.
Save editor tool for Diablo 3 Reaper of Souls and Eternal Collection, focused on Playstation 4 and Nintendo Switch
Stellar Realms was a free multiplayer text based browser game set in space with a focus in diplomatic and military conflict. This repo contains GreaseMonkey scripts and some websites I wrote to support some friends with the game. Code was imported including history from a private subversion repository