There is no installation require for Godot. Simply download and extract the binary from https://github.com/godotengine/godot/releases. Execute the binary to open the application. The whole application is contained within one binary file.
- I downloaded Godot_v3.3-stable_win64.exe.zip because I was running MS Windows 10 64-bit. Choose the one that match your operating system.
- When launching the executable, it asked me to open an existing project(Open Asset Library). Since, I don't have one, I cancelled it.
- Click on New Project to create a new project and fill all the fields.
- The main application window will look like this.