The original Zork I, II, and III went open source yesterday.
Unlike modern games where cheat codes are a Google search away, arcade codes in the early ‘90s were passed via word of mouth, magazine hint lines, or hidden in developer interviews. The Arcade Wizard design team deliberately made the difficult to discover for two reasons: arcade wizard warlock orb code
Access to the game's hidden chiptune audio tracks. Inside the Code: How It Works The original Zork I, II, and III went open source yesterday