Sent in by Sparky
It tells you "Congratulations you have defeated cobra and saved the
world from impending doom" then it shows you all the bosses that
you have beaten and a bunch of credits.
Then you go to a second quest with only two characters this time. Repeat
the game (the checkmarks are in new spots). Once you do this same old
congratulations... and bosses, and credits. Go to the third quest.
Same old, two characters, different spots for the checkmarks, some are
in some brutal locations, anyhow finish Cobra Commander and after the
congratulations, bosses and credits, you get an editor's note saying that
you have finished a really difficult game, and that you are a superior
player, and then it gives you a picture of a snake.
Sent in by Rey