Defold is a free and source-available game engine with a focus on high-performance. It uses Lua, a scripting language, and allows you to create games for desktop, mobile, web, and console platforms.
A simple way to generate unique names in your Defold games
Tutorials of game design concepts and feature implementations in Defold game engine projects
Defold Rendy provides a versatile camera suite and render pipeline in a Defold game engine project