Tetrinet

TetriNET is a multiplayer online Tetris game for up to six people, developed by St0rmCat in 1997 that supports team play.[1] The last official version is 1.13. The game was originally developed for Windows and was later ported to other systems. St0rmCat released TetriNET 2 in 2000, which features improved graphics, more types of special blocks, additional features (such as hold piece and block shadows), and a master server.[2]