We recently ran an interview with Thor writer Walt Simonson in which he mentions an Alien movie adaptation he worked on for Heavy Metal back in 1979 with Archie Goodwin and John Workman. I'd never read it before, so I looked it up. And guess what? It's an absolute jaw-dropper.
Is this bad boy in print? I'm pretty sure it's not (and that's a travesty). You can find it over at Grantbridge Street (link NSFW), and here are some of the comic's gorgeous spreads.