UPBGE is an open-source, 3D game engine forked from the old Blender Game Engine and deployed with Blender itself. This unified workflow is its main strength, as you can make your game from start to finish without leaving Blender.
This way you will be able to increase your productivity incredibly. You will be a one man army!!!
You can export your scenes to desktop (Windows, Linux and Mac), although an experimental Android version is on its way, and because it uses Blender's data format, it will be compatible with Blender. The files can be encrypted using the BPPlayer application to secure the game-deployment.