Minetest, an open source infinite-world block sandbox game

Minetest is amazing. My kids were obsessed with Minecraft. After introducing them to Minetest they love it too, and don't notice much of a difference. But, I love it because:

1. It's free as in speech!

2. It's super hackable! https://dev.minetest.net/Modding_Overview

3. It's light on resources. It's written in C++ and my 10 year old desktop computer can host a LAN server for 8 people at a time with no problems.

4. My kids are excited to learn to code, and this is a great bridge between Scratch and "something real." Without learning the complexities of graphics and game dev it's very easy to program small parts with "mods."

5. The build works on everything I've tried. Builds just fine on super old Debian stable running on my Pine Book Pro, and also builds fine on my bleeding edge Fedora machine.

6. It's already in most repos so you can install it easily. `dnf install minetest or `apt install minetest` . Some repos (like Debian) have a very old build, but it's easy to clone the github repo and build it yourself.