BallBlazer/Blaster was an unreleased LucasFilms game, if I remember correctly. It was leaked and so wildly pirated that they didn’t bother releasing it.
Ballblazer received several releases across multiple platforms, including cartridges for 7800 and Famicom.
The prototype "Ballblaster" was widely pirated, though, as well as "Behind Jaggi Lines" (Rescue on Fractalus) - I had both as a kid. Key differences between the prototype and the final release are the addition of the company logo in the intro, more developed opponent AI, and the "endless solo" in the music(my recollection is that the prototype only has the bassline and chords).
