Infinitris is a multiplayer, competitive Tetris. You are the falling block, and your mission - should you choose to accept it - is to fall your way into completing lines and causing the enemy players to mess up by sabotaging them or stealing their cells.
Move the block around with the arrow keys or WASD. Fall faster by holding down (the down arrow or S) or fall instantly with space. Hit enter to chat.
Think as many steps ahead as possible. Tetris is a long-running game, and there is plenty written about the strategy of the falling block. But if you want to excel at the competitive aspect of Infinitris, then get in your enemy's face and do your best to disrupt them however you can.