I do recall playing it on a CGA equipped machine later, but I distinctly remember my first experience of it being on the original green screen monochrome, and I

I do recall playing it on a CGA equipped machine later, but I distinctly remember my first experience of it being on the original green screen monochrome, and I was blown away. Wish I could remember if that machine had a Hercules graphics card in it, but I seem to remember someone saying that it didn't, and that the game was revolutionary because it went down to the display BIOS to manipulate the individual green pixels.