What are some alternatives?
When comparing Scratux and GDevelop, you can also consider the following products
Scratch - Scratch is a programming language that makes it easy to create your own interactive stories...
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
CoderZ - CoderZ is an online learning environment for programming virtual robots.
Unity - The multiplatform game creation tools for everyone.
Blockly - Blockly is a library for building visual programming editors.
Stencyl - Make iOS (iPhone/iPad), Android, Flash, Windows & Mac games without code using Stencyl.