The games include a number of Easter eggs, including a number of allusions to other Sierra games. For example, if a player types "pick nose" in the first game, (or clicks the lockpick icon on the player in the new version), if their lock-picking skill is high enough, the game responds: "Success! You now have an open nose". If the skill is too low, the player could insert the lock pick too far, killing himself. Another example is Dr. Cranium, an allusion to "The Castle of Dr. Brain", in the fourth game.