Ploy is an abstract strategy board game for two or four players, commercially released by 3M Company in 1970, as part of the 3M bookshelf game series. The game is said to have a "chess-like feel". As in chess, the game features several types of pieces, each with their own moving capabilities. The 3M game set includes a board and fifty pieces of various colors and shapes. The game is marketed as a "space-age strategy game". It is also considered to be one of the “better” chess variations.