What are some alternatives?
When comparing Vulkan and Unity, you can also consider the following products
OpenGL - OpenGL is the premier environment for developing portable, interactive 2D and 3D graphics...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
GameMaker - "With GameMaker, I went from no programming knowledge to full-time developer in 2 years!" Seth Coster - Butterscotch Shenanigans - Crashlands. "GMS 2 is absolutely amazing and I cannot get over how great this software is to use".