Breakthru is an
abstract strategy board game for two players, designed by
Alex Randolph and commercially released by
3M Company in 1965, as part of the
3M bookshelf game series. The game has been compared to
Chess and
Fox and Hounds, although it shows more characteristics of the
Tafl games of the
Middle Ages, such as Hnefatafl. As in Hnefatafl, the game features unevenly matched teams with different objectives. The 3M game set includes a board, twenty silver-colored pieces, a gold-colored "flagship" and twelve gold-colored "escorts". The game is played out as a naval battle analogous to the siege gameplay of Hnefatafl.