
- BGG rank
- BGG #463
- BGG rating
- 7.2
Mysterium
- 2–7 players
- 42 min
- Complexity 1.9/5
- 2015

2021
Rules assistance for Unsolved Case Files: Avery & Zoey Gardner
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.
For 1 player

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Answers come from the official rulebook, with the page to check.
Unsolved Case Files: Avery & Zoey Gardner is a board game released in 2021 for 1–8 players, 180 minutes per game, and ages 14 and up. Its main mechanics are Deduction and Cooperative Game.
DAVENPORT, OR - At 4:23 this morning, a man broke into a remote lake house where 19 year-old twins Avery and Zoey Gardner were asleep. The unidentified man murdered Avery and abducted Zoey before first responders could arrive. Police departments across two states are hunting for Avery’s killer and her twin sister Zoey, but neither has been found. Homicide detective, Angie Cullen, made a breakthrough in the case but then mysteriously disappeared. She left her detective’s notebook behind but authorities aren’t sure what to make of it. The killer is on the loose. Can you solve the case and get to Zoey, and also find the detective, before it’s too late? In order to solve this active murder mystery game you’ll need to find 3 separate clues. First find out who the accomplice is. Then identify the killer. And finally, save Detective Cullen. With 3 different mysteries to solve in order to play the game, this case will challenge your investigative abilities. To get past each step of the case you’ll need to visit an online answer page that requires you to prove you cracked it. If you don’t have the answer right you can keep investigating without being spoiled by the right answers.
Unsolved Case Files: Avery & Zoey Gardner supports 1–8 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for Unsolved Case Files: Avery & Zoey Gardner is 180 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists Unsolved Case Files: Avery & Zoey Gardner for ages 14 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
Unsolved Case Files: Avery & Zoey Gardner has a complexity rating of 2.0 out of 5 from BoardGameGeek players, which makes it a medium-light game. The rating reflects how much rules knowledge, planning and decision-making a typical game demands. Expect a longer first teach for heavier games, and use a preparation guide before game night.
Unsolved Case Files: Avery & Zoey Gardner belongs to these categories: Party Game, Deduction, and Murder / Mystery. Its main mechanics are Deduction and Cooperative Game. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The catalogue lists Unsolved Case Files: Avery & Zoey Gardner as a base game. It can be played on its own with the components in the box and does not require any other title. Expansions, if any exist, add new content or rules on top of it and are listed separately in the catalogue with a link back to this base game.