Luanti (formerly Minetest)
@Luanti

An open source voxel game creation platform. Play one of our many games, mod a game to your liking, make your own game, or play on a multiplayer server.
Available for Windows, macOS, GNU/Linux, FreeBSD, OpenBSD, DragonFly BSD, and Android.

Make sure to read each members' Liberapay page to see what they do and how they use donations.

👉 https://www.minetest.net/