Easter egg

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An Easter Egg is a small secret in games. Easter eggs usually doesn't associate itself with gameplay, but players usually find easter eggs due to interest in them. Easter eggs are secret stuff that was left in the game. An example is the cheese that secretly appears in every level of the game Perfect Dark.

Examples of Easter Eggs in Mario games:

• In Super Mario Galaxy, in the Toy Time Galaxy, a secret train set appears.
• In Donkey Kong 64, a picture of a strange frog appears.
• In the Atari 800 version of Donkey Kong, losing Mario's last life because of a fall, while in a point range of 33,000-33,900 (thus ensuring a new high score), and highlighting a Fireball in the difficulty selection will cause the initials of the port's developer, Landon Dyer, to appear in the title screen while the player waits for the attract mode to start up again.
• In Super Smash Bros Brawl, a picture of a cat appears in a house in Pokemon Stadium 2.
• In Super Mario Galaxy 2, three alien like figures appear in the background of Shiverburn Galaxy watching Mario(or Luigi).