When Chuck first meets Bryce at Stanford, Chuck shyly admits that he's planning to make his own version of the classic text based game Zork, which Bryce, another big fan of the game, agrees to help him build on a TRS-80 computer. This is another bond, along with both of them being engineering majors.
When Bryce sends Chuck the Intersect files he's just stolen in Chuck Versus the Intersect, he uses their version of Zork as a password to open the email that contained the Intersect database. The terrible troll and hero's satchel are unique to Chuck and Bryce's version and do not exist in the original, but the nasty knife does.
Real Zork Edit
Zork is a text based video game which was one of the first interactive fiction computer games and an early descendant of Colossal Cave Adventure.