Many people know that some DVDs had hidden goodies called Easter Eggs that the studios put in just for fun. Did you know games have some too? Some are easy to find, some took more than two decades to find.

Game: Earthworm Jim
Console: SNES, Genesis, Game Boy
Year: 1994
If you Pause the game and enter the code “YABBAYABBA” it will show you various pictures of one of the programmers of the game along with some amusing messages.

Game: Donkey Kong
Console: Atari 800
Year: 1983
Long rumored to be true, Programmer Landon Dyer hid his initials in the game. It took until 2009 for someone to find them. It’s a long process to find. You can read how to do it, or just watch the video below instead.

Game: Mortal Kombat
Console: SNES
Year: 1992
In the bridge stage, get a flawless victory against the computer in both rounds and perform a fatality at the end. You get to fight Reptile in the bottom of the spike pit.

Game: Duke Nukem 3D Atomic
Console: PC
Year: 1996
In the second to last level, run into walls and click the mouse button to reveal a hidden room. It’s Homer Simpsons Office from the Simpsons. In the show he works in a nuclear power plant in Sector 7-G.

Sorry, no video for this one.

Game: Day of the Tentacle
Console: PC
Year: 1993
Along with lots of Star Wars and other pop culture references, LucasArts decided to include the whole Maniac Mansion game with this one. All you have to do is use Weird Ed Edison’s computer to play it.

Sorry, no image, just use the computer.