TETR.IO is described as 'Free-to-win modern yet familiar online stacker. Play multiplayer games against friends and foes all over the world, or claim a spot on the leaderboards - the stacker future is yours!' and is a Puzzle Game in the games category. There are more than 10 games similar to TETR.IO for a variety of platforms, including Windows, Linux, Web-based, Android and Mac apps. The best TETR.IO alternative is KBlocks, which is both free and Open Source. Other TETR.IO like games are Tetris, Hextris, OpenBlok and Quadrapassel.
TetriNET is a multiplayer online Tetris game for up to six people, developed by St0rmCat in 1997 that supports team play. The last official version is 1.13. The game was originally developed for Windows and was later ported to other systems.
