World's Hardest Game 4 is the most difficult game you will ever play. Don't be fooled by its classy old-school look of moving squares, swinging circles and rectangular walls. This is a game that demands incredible precision from its players with no room for errors. Avoid the lethal blue circles patrolling the level or rigidly blocking the obvious route to the exit. Stick to the checkered paths so as not to fall off into the abyss below.