I originally created an account here after the discovery of the Spitfire Easter Egg, which completely blew me away! But while discussing old computers with some friends who are into pre-'80s gaming, we realized there was an even earlier Easter Egg played by a relatively small group of people in the '70s and promptly forgotten!
I’ve made a video about this forgotten game, and the other games with Easter Eggs that were created between it and Atari Adventure. (I link to the Select Button thread on the sources page, of course!)