# Green Glass Door > Green Glass Door is a pass-the-phone party game app for iPhone, iPad and Android, based on the classic "Green Glass Door" riddle. One player (the host) holds a secret rule; everyone else takes turns saying "I'm packing…" and an item, and the host answers "pack" (fits the rule) or "leave" (doesn't). The first player to crack the rule and prove it wins the round. 3–12 players, one phone, no account. Key facts: - The classic riddle's answer: only words with a double letter (the same letter twice in a row) can go through the green glass door — coffee yes, tea no; kitten yes, cat no. The name is the clue: green, glass, door. - The app has 13 rule packs and 141 secret rules. Glass Door (10 rules) and Categories (14 rules) are free. The other 11 packs — Letters, Nature, Tricks, Hardcore, Kids, Here & now, Backpack, Wordplay, Chain, Time, Invisible — need Green Glass Door PRO. - PRO pricing (USD): $7.99/week with an optional 3-day free trial, or $44.99/year (about $3.74/month). - Scoring: first player to pack their bag +3, second +2, everyone else who packs +1. The host scores 2 points (minus 1 per hint) when the rule was "just right", and 0 if nobody cracked it or everyone did within a couple of turns. Ties at the top go to a tiebreaker round. - To "pack your bag" a player names 3 items in a row that fit the rule; one miss and the turn passes on. - Settings: round timer (quick, long, custom or none), number of rounds, hints, and "write down items". - Also known as / related games: "I'm going on a picnic", "Pack your bag", secret-rule or guess-the-rule games. - Status: available now on the App Store (https://apps.apple.com/app/green-glass-door/id6824036129) and Google Play (https://play.google.com/store/apps/details?id=com.hareza.packit). ## Pages - [Home](https://green-glass-door-landing-production.up.railway.app/): what the game is, packs, pricing, FAQ - [Green Glass Door riddle](https://green-glass-door-landing-production.up.railway.app/green-glass-door-riddle): the answer, 70 examples of what can and can't go through, tips - [How to play](https://green-glass-door-landing-production.up.railway.app/how-to-play): full rules step by step, scoring table, settings, playing without the app - [Secret rule ideas](https://green-glass-door-landing-production.up.railway.app/secret-rule-ideas): 46 rules with pack/leave examples, for Green Glass Door and picnic games ## Optional - [Contact](https://green-glass-door-landing-production.up.railway.app/contact): support email therapgameapp@gmail.com - [Privacy Policy](https://green-glass-door-landing-production.up.railway.app/privacy-policy) - [Terms of Use](https://green-glass-door-landing-production.up.railway.app/terms-of-use)