The way that you can put a 3D camera and world inside a resizeable UI viewport container is really cool. I was able to make like a handheld console UI and just add the 3D view where the screen would be. Similarly the way you can make things in a 2D scene and then put it as a plane in a 3D world.

@Ategon One of the features that led me to finally decide on Godot over Unity/Unreal, and I think an overall underrated feature is how freaking fast it starts up.

Even on my cheap laptop, where I wouldn't even dream of running Unreal, I can just open up Godot and it'll be ready before I finish adjusting my glasses.

You can make use of the operating system's own text-to-speech systems, either as an accessibility feature or to create old-school voiced games. https://docs.godotengine.org/en/stable/tutorials/audio/text_to_speech.html It apparently should work out of the box on Windows and MacOS, but not all Linux distros will have the proper packages pre-installed.

This "name-something" functionality for import of 3D scenes is quite handy. https://docs.godotengine.org/en/stable/tutorials/assets_pipeline/importing_scenes.html

I don't know if shaders fall into this category, because everyone knows that it exists but I always feel like many people are afraid of trying to work with this and so just skip this entirely... And of course this is not limited to Godot.