Ken being versed in computer programming implemented Roberta’s black and white graphic designs. Seeing the potential in adventure-based video games and knowing that she could do better inspired the creation of Sierra On-Line. The game was expanded upon in 1977, with help from Don Woods and eventually ported to home computer systems. Roberta was playing Colossal Cave, a text adventure game developed between 19 by Will Crowther for the PDP-10 mainframe. 1981 – Ken and Roberta Williams, founders of On-Line Systems which would become Sierra On-Line Roberta grew dissatisfied with the text-only format and realized that the graphical display capability of the Apple II could enhance the adventure gaming experience. During the same time period his wife Roberta Williams was intrigued with text adventure games that were available on the Apple II computer. Ken Williams, a programmer for IBM purchased an Apple II computer with the intensions to develop a Fortran compiler for the Apple II platform. The company was founded by Ken and Roberta Williams in 1979 under the name On-Line Systems. They became known for their graphic adventure games series that were released in the 80s such as King’s Quest, Space Quest, Police Quest and Leisure Suit Larry. Sierra On-Line was a popular video game developer and publisher that primarily focused on developing for home computer platforms.

Download phantasmagoria sierra