
- BGG rank
- BGG #2,073
- BGG rating
- 7.3
Stellar
- 2 players
- 30 min
- Complexity 2.1/5
- 2020

2021
Rules assistance for Subastral
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.
For 2 players

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Answers come from the official rulebook, with the page to check.
Subastral is a board game released in 2021 for 2–5 players, 15–30 minutes per game, and ages 10 and up. It was designed by Ben Pinchback and Matt Riddle and its main mechanics are Hand Management, Set Collection, and Area Majority / Influence.
We need only lower our gaze from the stellar night skies to the planet below to see that beauty surrounds us! The biomes of planet Earth are as diverse and wondrous as the living creatures that populate them, and ideally you'll see more than your fair share of them in the strategic card game Subastral. In the game, you collect cards that represent your notes on eight different biomes: subtropical desert, savanna, tropical rainforest, chaparral, temperate grassland, temperate forest, taiga, and arctic tundra. You start the game with three random cards in hand; each card depicts one of the eight biome types and is numbered 1-6. Eight cards are placed onto six clouds in the center of the table, with the deck to the left of the #1 cloud and a sun card to the right of #6. On a turn, play a card from your hand onto the matching numbered cloud, then collect any pile of your choice to the left or right of the pile on which you played. If you choose a cloud to the left toward the deck, you add the cards on that cloud to your hand, then draw an additional card from the deck and add it to your hand. If you choose to the right toward the sun, you add those cards to your "journal", which is your collection of cards. Cards from the same biome go in the same pile, and you build piles from left to right in your journal as you collect cards from new biomes, with those piles being numbered 1-8. To end your turn, you draw a card from the deck to fill the empty cloud space. When you hit the "game end" card in the deck, complete the round, then play one additional round. Each player then scores for their journal in two ways: Score for your two biomes that have the most cards, with each card in those biomes worth as many points as the number of the pile. (In other words, whatever two biomes you start collecting last, you want to collect a lot of them since those cards will be worth the most points.) Next, you remove one card from each biome left to right until you hit an empty space or run out of biomes; the set is worth 1-36 points depending on the number of cards in it. Then you create another set collecting cards from left to right, etc. until your leftmost biome is empty. Whoever has scored the most points wins! Will your journal of research notes on the planet's biomes be deep and diverse enough to stand out amongst your peers?
Subastral 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 Subastral is 15–30 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 Subastral for ages 10 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.
Subastral has a complexity rating of 1.7 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.
Subastral belongs to these categories: Card Game and Environmental. Its main mechanics are Hand Management, Set Collection, and Area Majority / Influence. 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 Subastral are: Ben Pinchback and Matt Riddle. 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 Subastral 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.