In the asylum, get the hammer from the box in Sartorius's chambers, then go and click the brain with the hammer exactly ten times. Then if you navigate to where you see the hand, you'll see a picture of one of the programmers.

Type chloe from anywhere in the game, and it will take you to a library book. Open the book and turn the page to see "Drew in his natural habitat" (AndrewSilber, one of the programmers).

Type hellosailor anywhere in the game to see the history of Zork.

Go to the alchemy lab upstairs in the castle. Click ten times on the clay pot located on the table to see a photo of the design team.