Virtual egg
Since easter sunday has just passed, i found an article relating to digital easter eggs. i didnt know that such existed even before i was born. They inserted easter eggs in Atari pitfall II game. anyway, easter eggs according to yehey.com article is "Unlike cheats, Easter eggs are more of hidden properties or extra content of games that can be revealed by button combinations or by accessing areas in the game or the disc itself."
More info about the article here http://www.yehey.com/gadgets/articles.aspx?id=158876
