adventure game, particularly one with a genuine police officer involved in its development to ensure realism and authenticity. At the time, Sierra had produced numerous adventure games across a variety of genres—such as the King's Quest fantasy series, the Space Quest science fiction series, and the Leisure Suit Larry sex comedy series—but not many games following police or particularly modern settings. After the conversation, he gave Donna his business card and asked Walls to call him. In 1987, after retiring from the CHP, Williams invited Walls over for racquetball, which Walls was inexperienced in. After a few matches, they went for drinks, where they discussed Williams' idea of a police adventure game. Williams asked Walls to condense his experiences in the CHP into a short story, preferably around two pages long. Walls wrote the story and showed it to Williams several days later; Williams was impressed, and asked Walls to detail it into four or five pages. This process continued until Walls' short story developed into the plot of the first Police Quest game, at which point the story was converted into a design document and broken into game components for development. At the time, Walls was unfamiliar with computers, and was unsure if video game design was a viable career. Describing his experience writing the initial story concept, Walls reminisced: "When I first sat down in front of a computer to begin the design story of the original Police Quest, I had to be shown where the on/off switch was. I typed the entire story with two fingers (after all, the only skills I had at the time were chasing people down and throwing them in jail)." However, he soon overcame his concerns, and his computer skills developed with help from fellow Sierra designers Ken Williams, Roberta Williams, Mark Crowe, Scott Murphy, and Al Lowe. Many aspects of Police Quest were based on aspects of Walls' life: the series protagonist, Sonny Bonds, was loosely based on Walls' son (also named Sonny), and many incidents encountered in the game (and the next two Police Quest installments) were inspired by actual incidents encountered by Walls over the course of his CHP career. In 1987, Police Quest: In Pursuit of the Death Angel was released. The game placed heavy focus on realism and proper police procedure to succeed. Walls considered fan mail sent in by players, ranging from active police officers to