No Spin Tetris is a variation on the classic Tetris game, likely modifying the standard falling-block mechanics by removing or significantly altering the spinning mechanics of the blocks. While it shares the core concept of clearing lines, the absence of spinning makes for a unique gameplay experience. More information regarding its developer and release history would be required to paint a complete picture.

No Spin Tetris

Nintendo World Cup (USA) [Hack by Dacicus v1.0] (All Team Versus)