1. The Tetris Game The old Tetris game details. Tetris game instructions mention the seven one-sided tetraminoes in tetris as I, J, L, O, S, T and Z -due to their resembling letters of the alphabet-but players sometimes use other names for the pieces. All are capable of single and double clear.Tetris game kept records... Date: 6.6.2008, downloaded: 0 (total: 6), vote: