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Fred Sparks was a TI-Basic programmer that created games for the TI-83+ graphing calculator. He started his own programming group called Crescent Door Incorporated (CDI), but he was the only person that actually did anything and so it was basically a one-person group. He was also a member of Omnimaga, United-TI (UTI), MaxCoderz and CalcGames.
(Screenshot of Metroid)
He created some really high-quality TI-Basic games, including Metroid, Minesweeper greyscale, Flash Flash Revolution, and A Dot RPG. His games primarily took advantage of the xLIB Flash application created by Patrick Prendergast (tr1p1ea) that provided a wide assortment of features and functionality that was previously unavailable to TI-Basic programmers.
He was a regular on several of the TI community forums and EFnet channels, including #Omnimaga, #United-TI, and #CalcGames. In addition, his personal TI site was hosted through CalcGames with the site URL being a third-level sub-domain (i.e., http://cdi.calcgames.org).