What are some alternatives?
When comparing Tombstone Engine and Wick Editor, you can also consider the following products
Armory3D - Armory 3D is a free and open source game development software developed using Haxe and Kha and made to run inside Blender.
Unity - The multiplatform game creation tools for everyone.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Panda3D - Panda3D is a video game development engine and rendering software. It is developed and maintained by the Carnegie Mellon University Entertainment Technology Center.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.