
- BGG rank
- BGG #6,450
- BGG rating
- 6.8
Anno Domini: Flopps
- 2–8 players
- 30 min
- Complexity 1.4/5
- 2001

Rules assistance for ...I should have known that!
Plain-language explanations of turns, card effects and disputed situations, with saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
...I should have known that! is a board game released in 2011 for 2–99 players, 15–45 minutes per game, and ages 14 and up. Its main mechanics are Open Drafting.
Is starboard on the left or right side of a boat? How do you say “Japan” in Japanese? What is the character limit for Tweets on Twitter? How long did Sleeping Beauty actually sleep? …I should have known that! is an addictively entertaining trivia game with over 400 questions about things that you should know. In contrast to traditional trivia formats, you don’t receive points for answering questions correctly. Instead, points are subtracted for every incorrect answer! One thing is for sure: it will only be a matter of time before you hear yourself say… Doh!… I should have known that! — Description from publisher
...I should have known that! supports 2–99 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 ...I should have known that! is 15–45 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 ...I should have known that! 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.
...I should have known that! has a complexity rating of 1.0 out of 5 from BoardGameGeek players, which makes it a 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.
...I should have known that! belongs to these categories: Card Game, Party Game, and Trivia. Its main mechanics are Open Drafting. 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 ...I should have known that! 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.