Robot Wreckage is a Sega Genesis game in its beta stage, released in the USA. Beta releases often show unfinished graphics, gameplay mechanics, or other elements that were changed before the official launch.  The actual game's full features remain unknown, but being a beta, it may exhibit differences from its final, released version, if such a version ever existed. This makes it an interesting piece for studying game development processes.

Robot Wreckage (USA) (Beta)

RoboCop Versus The Terminator (Europe)