Archer MacLean‘s seminal Commodore 64 shooter, Dropzone is like a cross between Defender and, erm, Defender, but with more realistic graphics. And slightly different gameplay. But the principles are pretty much the same: super-fast, super-smooth, side-scrolling shooting. Avoid touching anything – or it’s instant death.
Dropzone is just as tough as Defender, and arguably just as good. High praise indeed…
And, yes: I know Dropzone was developed and released for the Atari 800 first, but I prefer the Commodore 64 version. There is something about it that just sings!
More: Dropzone on Wikipedia