
- BGG rank
- BGG #9,803
- BGG rating
- 6.1
Entropy
- 2–6 players
- 15 min
- Complexity 1.9/5
- 2015

Rules assistance for Entropy: Worlds Collide – Echo of Time
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
Entropy: Worlds Collide – Echo of Time is an expansion for Entropy: Worlds Collide released in 2017 for 2–5 players, 15–45 minutes per game, and ages 12 and up. It was designed by Allen Chang and Alannah Kearney and its main mechanics are Variable Player Powers, Hand Management, and Simultaneous Action Selection.
A thematic expansion for Entropy: Worlds Collide providing a lore-expanding story, game-expanding cards, a 1 vs many game mode, new Wanderer character, support up to 5 players, and more.
Entropy: Worlds Collide – Echo of Time supports 2–5 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 Entropy: Worlds Collide – Echo of Time 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 Entropy: Worlds Collide – Echo of Time for ages 12 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.
Entropy: Worlds Collide – Echo of Time belongs to these categories: Card Game, Deduction, and Science Fiction. Its main mechanics are Variable Player Powers, Hand Management, and Simultaneous Action Selection. 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 credited designers of Entropy: Worlds Collide – Echo of Time are: Allen Chang and Alannah Kearney. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists Entropy: Worlds Collide – Echo of Time as an expansion for Entropy: Worlds Collide. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Entropy: Worlds Collide to use it. Check that your edition of Entropy: Worlds Collide is compatible, as some expansions were revised between editions.