This is a collection of internal materials from Sega of America, notably documenting the development of Sonic the Hedgehog for English-speaking audiences. The materials are dated between 1990 and 1994.

This series houses internal documentation created and kept by Sitton. Of particular interest to researchers are the “Sonic the Hedgehog Bible” document and “Sonic Comic Book” materials stored in Box 1. Sitton’s list of contributions to various Sega games of the early 1990s rounds out this series.