Who is credited with having created the world's first video game Easter Egg?

Warren Robinett is credited with having created the world's first video game Easter egg. In 1978, Robinett, while working on the game Adventure for the Atari 2600, secretly added a hidden object known as the "Gray Dot" in a hidden room, accessible by finding a specific key. This Easter egg was the first of its kind in a video game, and its inclusion marked a significant milestone in the gaming industry, pioneering the concept of hidden surprises for players to discover and enhancing the overall gaming experience.