10 Most difficult games out there Contra. ... Mega Man 9. ... Flywrench. ... 1001 Spikes. ... Dota 2. ... Zelda II: The Adventure of Link. Zelda II is the black sheep of the Zelda series. ... Super Mario Bros.: The Lost Levels. A game so hard, it wasn't released outside Japan. ... Ghosts 'n Goblins. Ghosts 'n Goblins is for the most hardcore players. More items... Jul 6, 2021