In this free tetris-style arcade game you are to make a certain number of lines before your opponent does that in multiplayer mode.
http://netfreedomgames.com/
https://block-blast-online.com
Deftwun
SimplyPickles
http://wellgames.com/
http://www.blockpuzzle.com/
SimplyPickles
https://retrobowl.click
http://www.ziango.com/