Gotcha! is played on a 5x5 grid. Each player has a set of pieces numbered 1-25. On each turn one player places a piece face-down in a column or row and the other then places a piece face-down in a row or column so that the intersection of the two is an empty square. The numbers are revealed and both pieces are placed in the square with the higher on top, indicating that it won. (A tied square is unowned.) When all pieces have been played players score a point for every square and bonus points for orthogonal lines of at least three squares.