In July of 1977, Swiss artist H. R. Giger received an unexpected call from Dan O'Bannon, a Hollywood screenwriter who was very keen for Giger to help bring his latest screenplay, Alien, to life by way of some concept art. Days later, O'Bannon explained further in a letter that contained this list of things to be designed—a temple, the egg, the Facehugger, the Chestburster, and the "terrifically dangerous" Alien itself. As we now know, Giger took the commission on and became a vital member of the crew. Three years later, he and his team won an Academy Award for Best Achievement for Visual Effects for their incredible work.
(Source: Giger's Alien; Image: Giger at work, via.)
ALIENLIST OF ELEMENTS TO BE DESIGNED
EXTERIOR, ANCIENT TEMPLE. Approximately 20 meters tall. Should suggest an ancient, primitive and cruel culture.
INTERIOR, TEMPLE. This is where the Spore Pods are stored. This room is entered through a vertical tunnel in the roof (the normal entrance has long since collapsed). The Spore Pods can be seen ranked around the altar in the center of the room.
SPORE PODS. These are leathery, egg-shaped objects about one meter tall, which contain the larva of the Alien. They have a small "lid" on top which can pop off when a victim approaches.
THE ALIEN, FIRST PHASE. This is a small, possibly octopoidal creature which waits inside the Spore Pod for a victim to approach. When someone touches the Spore Pod, the lid flies off, and the small Alien (First Phase) leaps out and attaches itself to the face of the victim.
THE ALIEN, SECOND PHASE. Once the Alien (First Phase) has attached itself to the face of a victim, it lays eggs in the victim's stomach, and the egg grows into the Alien (Second Phase). This is a small creature which bites its way out of the victim's body.
THE ALIEN, THIRD (MATURE) PHASE. Having left its victim, the Alien promptly grows to man-size, whereupon it is terrifically dangerous. It is very mobile, strong, and capable of tearing a man to pieces. It feeds on human flesh. This creature should be a profane abomination. Our producers have suggested that something resembling an over-sized, deformed baby might be suffieciently loathsome. In any event, we wish you to feel free to create your own design.