I grabbed the sword and used it to slay all three of the dragons. Then I found the black key, opened the gates of the Black Castle, and ventured into its labyrinth. The gray dot was hidden right where it was supposed to be. I picked it up and carried it back across the tiny 8-bit kingdom, then used it to pass through the magic barrier and enter the Secret Room. But unlike the original Atari game, this Secret Room didn’t contain the name of Warren Robinett, Adventure’s original programmer. Instead, at the very center of the screen, there was a large white oval with pixelated edges. An egg.