Apeiros is an open-source 2D and 3D game engine written in C++, designed for modular, cross-platform development. It supports rendering, physics, and scripting, ideal for indie games or simulations. Apeiros targets Windows, macOS, Linux, and mobile platforms, with a focus on extensibility. Without a visual editor, it suits C++ programmers, with minimal documentation and a niche community. Its MIT license ensures openness, though it’s less mature than Godot. Apeiros’s modularity makes it perfect for developers building custom engines, but its early stage limits adoption. Suitable for experimental projects requiring flexibility and performance.