Most games are created on the Unreal or Unity engine? Not necessarily... - a list of custom engines used in games

The repository we are looking at features a project related to implementing a simple game engine in a retro style. It's written in the Pascal programming language and aims to give users an understanding of how 2D games operate. The documentation includes a detailed description of the project's architecture and the components used within it. Developers also outline how to set up the working environment, which makes it easier for other programmers to use the project. Additionally, there are code examples provided that can be utilized as a starting point for one's own projects. Overall, this serves as an engaging resource for both beginners and experienced developers alike.