Man, what is it about the Aliens franchise that makes its video game adaptations so easily cancelable? Long, long before Obsidian's Aliens RPG ended up on the cutting room floor, Square had its own unreleased entry into the franchise: A 1987 side-scrolling action game for the Famicom Disk System (the disk-loading NES attachment which never quite made it stateside).
A ROM for the canned title recently appeared online; you can check out some footage from an emulated version of the game over at 1UP. It actually doesn't look too terrible -- though back in 1987, we really only had room in our hearts for one unstoppable, alien-obliterating heroine, and that room was totally already spoken for.