I only recently found out about: https://o3de.org/ https://o3de.org/ https://github.com/o3de/o3de https://github.com/o3de/o3de Seems to be opensourced engine

I only recently found out about: https://o3de.org/ https://o3de.org/ https://github.com/o3de/o3de https://github.com/o3de/o3de Seems to be opensourced engine based on Amazon's Lumberyard engine, which itself was based on Crytek's engine (!!).