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|Location||Lake Geneva, WI|
|Notable people||Gary Gygax, Dave Arneson|
TSR, Inc. was an American game publishing company most famous for publishing the Dungeons & Dragons role-playing game. Tactical Studies Rules was formed in 1973 as a partnership between Gary Gygax and Don Kaye, scraping together $2,400 for startup costs, as a means to publish formally and sell the rules of Dungeons & Dragons, one of the first modern role-playing games. The company was purchased in 1997 by Wizards of the Coast, which no longer uses the TSR name for its products.