Move a dot down a corridor and your character–really just a colored square–will be able to enter a room, in which you see the words, “Created by Warren Robinett.” Back then, video-game developers weren’t given credit, so Robinett inserted his byline into the game. It also introduced the Easter egg to the gaming world. Released on Christmas in 1979, Atari’s Adventure is considered the first action-adventure game. Click on the titles for videos and more information on how to find the Easter eggs. From the very first Easter egg, hidden in a 1979 maze game (and, coincidentally, the first on this alphabetical list), to all of those UFOs and ghosts in the latest Grand Theft Auto release, here are 50 of the greatest gaming Easter eggs of all time. A lot of times, finding the Easter eggs in a game can be as fun and challenging as actually playing the game itself.

If the term “Easter egg” makes you think of hunting down hidden jokes, details, and stories in video games - and not, you know, the Easter holiday - then this list is for you.

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