BlobQuest is a homebrew platformer for the NES. The premise involves the player character being turned into a blob by an evil wizard. You must now find the eight mystic rubies in order to return back to normal. Along the way, you can find special powerups for your blob form that allow you to traverse the hazardous world.
Cephla, Samsara, ThunderAxe31, and Alyosha collaborate to complete the game in record time, making liberal use of a zipping glitch in the second half of the run.
You can get the game here.
Watch this run being played back on a real console.