The answer to the Board game with 400 squares 84 tiles in 21 shapes in CodyCross is BLOKUS. CodyCross is an amusing word game. It is a word play game that challenges one's word knowledge in different categories and themes. If this clue had you baffled, you're not alone! Many of the puzzles in CodyCross are pretty tricky, but that's what makes the game so fun.