What are some alternatives?
When comparing OpenGL and Unreal Engine, you can also consider the following products
Vulkan - Vulkan is a new generation graphics and compute API that provides high-efficiency, cross-platform access to modern GPUs used in a wide variety of devices from PCs and consoles to mobile phones and embedded platforms.
Unity - The multiplatform game creation tools for everyone.
SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.