is this going to be 'rescue on fractalus'?

EDIT: It is! Had the commodore version - fun memories :)

c64: https://www.youtube.com/watch?v=fjR33K_wuD8

One of my all time favorite games, without a doubt. I used to play it on the Atari 800XL, but it had a different name, I believe. "Behind Jaggi Lines", I want to say.

Edit: fixed game name

Behind Jaggi Lines! was actually a development version that was pirated heavily amongst Atari owners. I played it on my Atari 800. It was the first game that actually made me jump out of my chair, scaring me. I can remember the moment vividly. Great game!