Godot

Free game engine with wide compatibility. https://godotengine.org/

At the moment there are two versions 3.x.x and 4.x.x. Version 4 is actively developed and has the newest features, version 3 is just maintained a little bit.

I think a lot of stuff was changed in the background and the way signals are used from 3 to 4. Also they dropped the visual scripting support.

What makes this worth mentioning is that a lot of available information is about Godot 3.x.x because it was out there for very long. If you use GPT or other chatbots for coding, be careful it may spit out the wrong version or worse a mixture.