Tetrads.io is a fascinating multiplayer IO game about Tetris bricks that match other bricks to become the biggest structures on the game field. You an play this game online and for free on Silvergames.com. Seems like all those Tetris squares got crazy and started to go at each other to see which one can attach more bricks to it.
Control a tiny little square on a battlefield full of angry, ambitious players with no mercy and try to form a huge pile of bricks attaching them to you. You can slide through the field looking for parts to take over and, once you are big enough, go hunt other players to hit them and take their bricks. Have fun playing Tetrads IO!