[infinitezest]

If you don't mind using Lua instead, I can recommended minetest as a free alternative. I've had a lot of fun messing around in it. It has a lot of great games and mods as well.

https://www.minetest.net/

[b_mc2]

Minetest is definitely fun, and I've had good luck using Miney to build in it with Python

https://miney.readthedocs.io/en/dev/index.html

[born-jre]

For FPS lovers, recommend this

server: https://github.com/piqueserver/piqueserver client: https://github.com/yvt/openspades

[deknos]

lua! great! There's also blockly (which is a free version of scratch, the visual programming language), but i wanna have a real language! thanks!