Street Fighter 2
If someone (Dhalsim maybe) keeps beating you select
a strong player at the start of the game. Then once
you've beaten the character that you usually can't
beat let the person after that defeat you to get to
the player selection screen. Don't press [Spacebar]
but with the cursor keys select the player that you
can't complete the game with. You can now finish off
the rest of the characters and complete the game.
Start the game with the sf2 /updownmove command line parameter.
The screen will follow your character's jumps.