GamePlay 2D/3D is described as 'GamePlay is an open-source, cross-platform, C++ game framework/engine for creating 2D/3D mobile and desktop games' and is an app in the Development category. There are six alternatives to GamePlay 2D/3D for a variety of platforms, including Mac, Windows, Linux, Android and iPhone. The best alternative is LÖVE, which is both free and Open Source. Other great apps like GamePlay 2D/3D are nCine (Free, Open Source), GeeXLab (Free), DragonRuby Game Tookit (Freemium) and Amulet (Free, Open Source).
Amulet is a Lua-based toolkit for experimenting with interactive graphics and audio. It provides a cross-platform API for drawing graphics, playing audio and responding to user input, and a command-line interpreter for running Amulet scripts.
A simple framework for creating VR with Lua. LÖVR projects work on Windows, macOS, and Linux. You can run the same code on an HTC Vive or an Oculus Rift, and there's even a drag and drop tool for exporting projects to WebVR.