Blender is open source software that is free. I started using Blender about 1-1/2 yrs ago. I had to learn it to teach 3D modeling with my students. Last year was my first year teaching animation and game design. Here is a video that you can watch of my middle student’s video game. I’ve been giving him private lessons. He’s been working on it for 2 weeks on and off that his point. He still needs a game menu and directions for how to play the game.  Student Game Video.