I still write plugins like this for source engine games using sourcemod/sourcepawn (the successors to amx and pawn respectively) occasionally, and it's still fun. Much harder to get people to play your mods since the games aren't as popular as they once were, but there's something about the engine that makes it really satisfying to mess with and bend to your will despite it being a massive pile of spaghetti. Helps that the entire source code tree has been leaked multiple times before, too.