Interplay is a relatively simple abstract strategy game. Play is conducted with metal pegs on a wooden board. When placing a new peg, players place a peg 3 spaces away from the previously played one - either straight, diagonally, or in an L shape. Players score points for every peg adjacent (orthogonally or diagonally) to the peg they place. A round ends when all 37 pegs are placed (or if, due to the gameplay, no further pegs can be placed).