Seastalker on the Commodore 64 is Infocom’s beginner-friendly underwater adventure where you play a young marine explorer investigating strange activity around a Caribbean island. Using the Seastalker sub and a handful of gadgets, you solve approachable puzzles, explore reefs and underwater tunnels, and unravel a light mystery with a breezy, kid-friendly tone. It’s short, charming, and designed as a gentle on-ramp to interactive fiction—more fun ocean romp than punishing brain-burner.