What are your favorite Easter Eggs?

This was inspired by the Anthropic Buddy thing, which was really just hidden code, but it reminded me of an Easter Egg. So I found in a BBC article the very first Easter Egg. It was on Atari in the game "Adventure" and involved you picking up a single pixel and taking it somewhere (single pixels were enormous). When you got there, there was text telling you the name of the person who created the game. The developer did this because Atari refused to give developers credit for games. Here's a... Read more