An expedition was sent to the moon, to explore mysterious ancient ruins that were discovered there. Your name is Glenn, and you are the head of this expedition, consisting of several men and the lovely girl Erin. But a terrible accident occurs, and you are morphed into an alien creature. Now your whole essence is nothing but lust, and raping Erin is all you can think about. But not all is simple. Since your former friends don't recognize you, they will kill you on sight. You must choose your path cleverly to avoid getting killed and to attain your monstrous goal.

Eden is an adventure with pre-rendered movies, or, better to say, a pre-rendered movie with some adventure gameplay elements. You are automatically taken through the locations and the story of the game, but from time to time you'll have to decide where to go. The movie turns into a pre-rendered image, and you can click on different arrows to choose your path. If you choose the wrong way, you'll be killed. At few points, you'll also be able to examine objects, whenever the corresponding cursor is highlighted.

[From Moby Games]