List of Open Source Games
OpenTTD https://store.steampowered.com/app/1536610/OpenTTD/
Mindustry https://store.steampowered.com/app/1127400/Mindustry/
OpenRA https://www.openra.net/
Beyond All Reason https://www.beyondallreason.info
Widelands https://www.widelands.org/
Minetest https://www.luanti.org/
ClassiCube https://www.classicube.net/