Ken Williams, On-Line Systems' founder, swears that at a time when Apple had only sold 100,000 Apple II computers, Sierra had sold 25,000 copies of Softporn. Softporn was probably played by the highest percentage of computer owners of any game in history.
The game's cover shows 3 nude women and a waiter in a hot tub. The hot tub was located at the house of Ken and Roberta Williams, On-Line Systems' owners. The circles in the background is a duplicated image of the top of the hot tub. The woman on the left was a shipping clerk at On-Line Systems, the one in the center is the wife of Bob Davis who created Ulysses and the Golden Fleece and the one on the right is Roberta Williams herself. The man was a waiter from a local restaurant. The image was featured in TIME magazine's first story on computer games.