
- BGG rank
- BGG #3,406
- BGG rating
- 7.8
KeyForge: Mass Mutation
- 2 players
- 15–45 min
- Complexity 2.8/5
- 2020

Rules assistance for KeyForge Adventures: Abyssal Conspiracy
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.
KeyForge Adventures: Abyssal Conspiracy is an expansion for KeyForge Adventures: Rise of the Keyraken released in 2021 for 1–3 players, 45–90 minutes per game, and ages 14 and up. It was designed by Brad Andres, Tyler Parrott, and Aaron Haltom and its main mechanics are Cooperative Game and Solo / Solitaire Game.
After defeating the Keyraken, the first adventure in KeyForge Adventures, the Archons find that the danger has not yet abated, for their ship is crippled by a mysterious saboteur who escapes before justice can be served! In this second adventure, you must navigate a grid of nine locations as you descend into the ocean’s depths to uncover the conspiracy and find the tool you will need to put an end to its villainy. Exploring the ocean’s depths is a dangerous and uncertain undertaking, and whatever force is attempting to foil the Archons is not waiting around to be stopped. As the tide shifts against you, can you stop this conspiracy before it unleashes an otherworldly power across the Crucible? —description from the publisher
KeyForge Adventures: Abyssal Conspiracy supports 1–3 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 KeyForge Adventures: Abyssal Conspiracy is 45–90 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 KeyForge Adventures: Abyssal Conspiracy 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.
KeyForge Adventures: Abyssal Conspiracy belongs to these categories: Card Game, Fantasy, and Print & Play. Its main mechanics are Cooperative Game and Solo / Solitaire 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 credited designers of KeyForge Adventures: Abyssal Conspiracy are: Brad Andres, Tyler Parrott, and Aaron Haltom. 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 KeyForge Adventures: Abyssal Conspiracy as an expansion for KeyForge Adventures: Rise of the Keyraken. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need KeyForge Adventures: Rise of the Keyraken to use it. Check that your edition of KeyForge Adventures: Rise of the Keyraken is compatible, as some expansions were revised between editions.