Minecraft. Runescape. Mindustry. Slay the Spire. Project Zomboid. Doodle Jump. Shattered Pixel Dungeon. Delver. Lots of mobile games. Also It’s rediculous to say Java is inappropriate for games when C# is used for games via Unity (unity is the value proposition there - c# is very similar to Java)
Java is (or at least used to be) one of the first languages new programmers started with.
Making it very accessible to create new mods.
I haven’t modded as of yet but I started off with Java and am now a C# Dev and the transition wasn’t too hard since most of the same principles apply to both languages. Unity games, that are often written in C# to me are the most moddable ones, especially considering that there’s a ecosystem for Unity mods out of the box