
- BGG rank
- BGG #1,596
- BGG rating
- 8.7
Arkham Horror: The Card Game
- 1–4 players
- 60–120 min
- Complexity 3.8/5
- 2026

Rules assistance for SSO: Parasites
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.
SSO: Parasites is an expansion for SSO released in 2019 for 1–6 players, 45–90 minutes per game, and ages 14 and up. It was designed by Glenn Ford and its main mechanics are Variable Player Powers, Player Elimination, and Area Movement.
A 31 card tuck box including 24 Challenge Cards, 6 Mission cards and 1 Achievement card. Allows players to face a new threat and tell a new story of survival horror on the SSO. The new deck's theme features a deadly alien parasite which will infect, control and kill the crew. —description from the publisher
SSO: Parasites supports 1–6 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 SSO: Parasites 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 SSO: Parasites 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.
SSO: Parasites belongs to these categories: Card Game, Horror, and Science Fiction. Its main mechanics are Variable Player Powers, Player Elimination, and Area Movement. 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 SSO: Parasites are: Glenn Ford. 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 SSO: Parasites as an expansion for SSO. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need SSO to use it. Check that your edition of SSO is compatible, as some expansions were revised between editions.