✅ World's Hardest Game to play online for free. The most difficult game in World 1 is a skill puzzle in which, to play, you have to move your piece while many other elements make predictable movements but make you very skillful to avoid them. Move cautiously around the screen, avoid the moving pieces and get to the end in the so-called Hardest Game in the World. And if you want more challenges, try challenging yourself with more complex skill games by exploring the Hardest Games category. We have updated this game and it is no longer in Flash version, and it can now be played on any device.