3 minutes ago, Gidrek said:

PD: I have C# Game Programming book too, but now is a little outdated

Book was written in 2010. Modern OpenGL existed. Author said at the beginning of the book that the book are not about graphics and he chose deprecated OpenGL. I like that he uses TDD and the examples of his book are with unit tests. I rewrite examples in modern OpenGL 3.x using OpenTK. I think most of ideas from his book will be actual a long time.

13 minutes ago, Gidrek said:

Do you know that the author has another site? (https://howtomakeanrpg.com/)

No, I did not know. Thank you! I knew only about his old website: http://www.godpatterns.com/

15 minutes ago, Meovyle said:

So what engine is better in doing specific things?

Like your personal favourite?

There are many specific things. For example, Unity is not the best for HTML5 games. Yes, you can build your game to HTML5/WebGL from Unity but Unity Team does not support WebGL build on mobiles. You can read about it in official documentation on this page: https://docs.unity3d.com/Manual/webgl-browsercompatibility.html

Quote

Note that Unity WebGL content is not currently supported on mobile devices. It may still work, especially on high-end devices, but many current devices are not powerful enough and don’t have enough memory to support Unity WebGL content well. For this reason, Unity WebGL shows a warning message when trying to load content on mobile browsers (which can be disabled if needed).

If you want to make HTML5 game you will get, for example, Phaser or Pixi.js for 2D or Babylon.js or Three.js for 3D. It is difficult question why someone prefer one tools and do not want to use another's. I like to study these WebGL tools because you can run HTML5/WebGL games with one click from any OS. But someone do not like WebGL and I do not understand why. Tastes differ.