
- BGG rank
- BGG #4
- BGG rating
- 8.5
Gloomhaven
- 1–4 players
- 60–120 min
- Complexity 3.9/5
- 2017

Rules assistance for Altar: One Must Prevail
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.
Altar: One Must Prevail is an expansion for Altar: Realms of the Gods released in 2024 for 1 player, 30–45 minutes per game, and ages 14 and up. It was designed by Vasilis Patroulias and its main mechanics are Hand Management, Solo / Solitaire Game, and Card Play Conflict Resolution.
Experience the thrilling world of Altar like never before with this groundbreaking expansion. One must prevail revolutionizes gameplay by introducing a solo mode, allowing you to embark on an epic adventure all on your own. No longer bound by the constraints of multiplayer, you can now delve into the realms of Altar at your own pace and immerse yourself in a captivating solo experience. But that’s not all. Alongside the introduction of solo play, One must prevail brings forth a new deity – the enigmatic and unpredictable God of Chaos. This deity’s abilities will test your strategic thinking and adaptability like never before. Prepare to navigate the twists and turns of chaos itself as you harness its immense power to shape the fate of Altar. Are you ready to face the challenges of Altar alone and confront the chaos that awaits? Prepare to embark on an unforgettable solo adventure. One must prevail beckons you, with boundless possibilities and the thrill of unruly unpredictability. Will you find order in the chaos or succumb to its whims? The choice is yours. Will you prove yourself worthy? —description from the publisher
Altar: One Must Prevail supports 1 player according to the catalogue. This is the publisher’s listed player count, so the game is designed for exactly that number of participants. Variants for other group sizes, if any, are described in the rulebook of your edition, so check it before setting up a different configuration.
The listed playing time for Altar: One Must Prevail is 30–45 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 Altar: One Must Prevail 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.
Altar: One Must Prevail belongs to these categories: Card Game, Fantasy, and Expansion for Base-game. Its main mechanics are Hand Management, Solo / Solitaire Game, and Card Play Conflict Resolution. 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 Altar: One Must Prevail are: Vasilis Patroulias. 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 Altar: One Must Prevail as an expansion for Altar: Realms of the Gods. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Altar: Realms of the Gods to use it. Check that your edition of Altar: Realms of the Gods is compatible, as some expansions were revised between editions.