Disney's DuckTales

Complete the game with exactly zero dollars to unlock the bad ending.

When your score has a 7 as the 10-thousands digit(for example 170,000), call Launchpad to take you back home; he will drop you off at a secret bonus stage.

At the right extreme of the second floor, there is a large coffin which is marked "R-I-P". Cane jump on top of that coffin and you can walk through the right wall, which happens to be an illusionary wall. On the other side of this wall there is a chest, which contains the extra hit point.

In the Amazon level, when you will eventually get to a big gray statue that will offer you a way up if you pay a certain amount of money. Choose ''No'' and then make Scrooge turn around and walk a little to his left. You should see one of the enemies that throw plungers at you approaching. Place yourself right under the rope that is at the top of the screen. Now, dodge the plumbers that the enemy throws at you, and then use Scrooge's cane to jump off the top of that enemy in order to reach the rope without paying the statue.

Score at least $10,000,000 and then beat the game. You'll see a slightly different ending.