A free, open source, cross-platform, 2D game engine
I am actively working on my own video game engine based on MonoGame.
If you are interested in it, head over to my GitHub and check out the source code:
https://github.com/Lajbert/MonolithEngine
If you’d like to read my bachelor’s thesis work (PDF) regarding the design of the engine, head over to this post and download the file:
https://lajbert.com/2021/06/24/behold-my-bachelors-thesis-developing-a-2d-video-game-engine-using-monogame/