No its far too late for chocolate eggs, isnt it?
Easter Eggs are special things that game developers put into games to get players to find so that they enjoy the game more and it is usually done to help people relax and want to carry on finding more silly things as they play.
Some Easter Eggs are like cheats and that has to be said with one of the biggest people game in the world, The Sims.
If you press the right keys in the right order in games other things could also happen.
So play around in your games, you never know what you might find lurking in there!