Under 2 hours with 100% - Samus with suit off, standing up with a clear image of her to the left. Best Appearance
Under 2 hours, under 100% - Samus with suit off, leaning up a ledge with head leaned back.
Over 2 hours, 100% - Samus with suit off, in a city.
Over 2 hours, under 4 hours, under 100% - Samus with helmet off.
Over 4 hours, under 100% - Nothing Special. Worst Appearance.
To see the secret message, you must defeat Nightmare in Sector 5 (ARC) and return to a Navigation Room WITHOUT getting the Diffusion Missile upgrade. A conversation between you, Adam and the Secret Guy will commence.