UPBGE
An open continuation of Blender Game Engine combining modeling, animation, logic, and runtime in one project.
Why use it
Art-led small teams reduce DCC-to-engine round trips and build interactive prototypes quickly.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
Its versions differ from mainline Blender; evaluate shipping performance, platforms, and GPL distribution obligations.