Contigo

The 3M bookshelf game series is a set of strategy and economic games published in the 1960s and early 1970s by 3M Corporation. The games were packaged in leatherette-look large hardback book size boxes in contrast to the prevalent wide, flat game boxes. The series grew to encompass over three dozen games. Most were multi-player board games or card games; a few were trivia games or two-handed board games. Acquire and TwixT were among the best-selling titles.

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