Enter green alien, green alien, blue square, green alien as the password.

Effect	Password
'Furd Herder' mini-game	Green Alien, Green Alien, Blue Square, Green Alien.
'Snake' mini-game	Red Circle, Green Diamond, Blue Square, Green Alien.
Hidden Printer Feature	Green Alien, Green Alien, Red Circle, Blue Square.
Programmers' Heads mini-game	Green Alien, Green Alien, Red Circle, Blue Square.
Super Secret Passes	Green Diamond, Pillar, Pillar, Green Alien (10x); Red Circle, Pillar, Pillar, Blue Square (10x).
View 'Original' Story	Blue Square, Pillar, Green Diamond, Green Alien.
View 'Real' Story	Yellow Alien, Pillar, Pillar, Green Alien.
View Credits	Pillar, Yellow Alien, Green Diamond, Green Diamond.
Wave 10 Complete	Yellow Alien, Yellow Alien, Blue Square, Green Alien.
Wave 15 Complete	Green Diamond, Yellow Alien, Green Alien, Green Diamond.
Wave 20 Complete	Green Diamond, Blue Square, Green Diamond, Green Alien.
Wave 25 Complete	Pillar, Yellow Alien, Blue Square, Pillar.
Wave 30 Complete	Green Alien, Red Circle, Pillar, Pillar.
Wave 35 Complete	Red Circle, Red Circle, Yellow Alien, Yellow Alien.
Wave 40 Complete	Pillar, Green Diamond, Green Diamond, Red Circle.
Wave 45 Complete	Yellow Alien, Green Diamond, Red Circle, Pillar.
Wave 5 Complete	Red Circle, Yellow Alien, Blue Square, Yellow Alien.
Wave 50 Complete	Blue Square, Green Diamond, Yellow Alien, Blue Square.
Wave 55 Complete	Pillar, Blue Square, Blue Square, Yellow Alien.
Wave 60 Complete	Red Circle, Blue Square, Red Circle, Green Alien.
Wave 65 Complete	Red Circle, Green Diamond, Green Diamond, Green Alien.
Wave 70 Complete	Red Circle, Blue Square, Blue Square, Pillar.
Wave 75 Complete	Green Alien, Green Alien, Yellow Alien, Red Circle.
Wave 80 Complete	Pillar, Red Circle, Red Circle, Pillar.
Wave 85 Complete	Blue Square, Green Alien, Green Diamond, Red Circle.
Wave 90 Complete	Yellow Alien, Green Alien, Red Circle, Green Diamond.
Wave 95 Complete	Pillar, Pillar, Green Alien, Blue Square.