
- BGG rank
- BGG #37
- BGG rating
- 8.3
Too Many Bones
- 1–4 players
- 60–120 min
- Complexity 3.9/5
- 2017

Rules assistance for 20 Strong: Solar Sentinels
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

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Answers come from the official rulebook, with the page to check.
20 Strong: Solar Sentinels is an expansion for 20 Strong released in 2023 for 1 player, 30–45 minutes per game, and ages 14 and up. It was designed by Josh J. Carlson and its main mechanics are Dice Rolling, Solo / Solitaire Game, and Move Through Deck.
Earth’s future is bleak. Despite harnessing the sun's power and siphoning plasma to advance technologically by leaps and bounds, the world faces an existential-level threat in the Horde. This encroaching alien species has set up a base beneath the surface of Earth’s moon, and these destructive moon bugs are preparing a final invasion to wipe out humanity. The only thing standing between Earth and oblivion is a beleaguered fighting force known as the Solar Sentinels. Wielding the power of the sun and embarking on a last-ditch assault of the Horde’s lunar base, these brave Sentinels hope a surprise attack might destroy the Horde before it’s too late. Solar Sentinels is a new property debuting in the 20 Strong game system, featuring a squad of stellar warriors fighting off an alien invasion. Players will select their sentinel and choose each round between one of three face-up opponents. They will deploy units to dispatch their enemies and collect rewards on their way to take down the alien leaders at the source of the invasion. The Solar Sentinels deck is included in the original core box of 20 Strong but also available by itself.
20 Strong: Solar Sentinels 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 20 Strong: Solar Sentinels 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 20 Strong: Solar Sentinels 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.
20 Strong: Solar Sentinels has a complexity rating of 3.5 out of 5 from BoardGameGeek players, which makes it a medium-weight 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.
20 Strong: Solar Sentinels belongs to these categories: Expansion for Base-game. Its main mechanics are Dice Rolling, Solo / Solitaire Game, and Move Through Deck. 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 20 Strong: Solar Sentinels are: Josh J. Carlson. 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 20 Strong: Solar Sentinels as an expansion for 20 Strong. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need 20 Strong to use it. Check that your edition of 20 Strong is compatible, as some expansions were revised between editions.