Adding in Easter eggs into AAA production-sized games is dangerous. If it’s a famous Easter egg based on some longstanding pop-cultural reference then it’s likely a safe bet to include it. If it’s a reference to another comic book, another video game, or even a popular movie, then it’s also likely a safe bet to include it. Where Easter eggs get dangerous is when they reference some event that has an expiration date on it, such as a birthday gift, a a current event, or maybe even a marriage proposal. For Insomniac Games’ newest PS4 release, Marvel’s Spider-Man, the developers included a very personalized Easter egg for one gamer, but it turned out to be one of the most depressing Easter eggs ever.