In the video game Adventure, a player controls a square avatar whose quest is to explore an open-ended environment to find a magical chalice and return it to the golden castle. The programmer working on the game slipped a secret feature into the game, and when the player moved an “invisible square” to a particular wall, the “secret room” contained a simple phrase: “Created by WarrenRobinett."

For any fan of the classic video game, this Adventure Easter Egg Atari T-Shirt is a must have!