Deadline on the Commodore 64 is an Infocom interactive fiction murder mystery where you play an unnamed police detective investigating the supposed suicide of wealthy industrialist Marshall Robner at his Connecticut estate. Over the course of a single in-game day you roam the house and grounds in pure text, examining rooms and objects, tracking the movements of six independently acting suspects, and grilling them through ASK/TELL-style conversations while time steadily advances. Your goal isn’t just to name a culprit but to gather solid evidence of motive, method, and opportunity, then time your accusation and arrest correctly—otherwise the suspect walks and the case collapses. The C64 version preserves the game’s reputation for high difficulty, intricate NPC behavior, and reliance on the physical “feelies” (casebook, pill bag, interview notes, lab reports) that originally came in the box to provide crucial clues.