He has continued to work in the coin-operated amusement industry, currently serving as production coordinator for Raw Thrills, Inc. / Play Mechanix, Inc. Mark is the younger brother of fellow pinball designer Steve Ritchie.
[2] A few months later, Ritchie was part of a group selected to help start Atari's pinball production facility in Sunnyvale.
He served there as a production line lead and in 1978 was promoted to prototype specialist within Atari's pinball engineering group.
[1] Ritchie went on to design a total of 12 games for Williams, including Taxi, Diner, Fish Tales and Indiana Jones: The Pinball Adventure.
[4] While at Williams Electronics, Ritchie also designed two "pitch-and-bat" novelty amusement games, Pennant Fever and Slugfest.
Ritchie also designed Orange County Choppers – a video pinball game themed after the popular reality television series.