In 2022, games educator Gustavo Pezzi wrote this guide on how to make a C++ engine, information that seems to become increasingly relevant by the day. While the tutorial does not go deep into coding or technical details, it does go over some of the fundamental building blocks that are required to create a simple game engine with C++, explaining the main elements that are required in a game engine, and serves as a great primer for learning the basics before pursuing more specific to your game.
Check out the full blog post on Game Developer.
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