4Stack #89 — answers & breakdown

Saturday, October 10, 2026

The sixteen cards in this puzzle were: Zork, Colossal Cave Adventure, Planetfall, The Lurking Horror, 80 Days, Anchorhead, Photopia, Counterfeit Monkey, Inform, Twine, TADS, ChoiceScript, XYZZY, Inventory, Examine, Go north.

The four stacks

Text adventure classics

Zork, Colossal Cave Adventure, Planetfall, The Lurking Horror

Modern interactive fiction

80 Days, Anchorhead, Photopia, Counterfeit Monkey

Interactive fiction tools

Inform, Twine, TADS, ChoiceScript

Parser commands

XYZZY, Inventory, Examine, Go north

Want to try it yourself? Play puzzle #89 — archive plays don't affect your streak. Or jump into today's puzzle.