OrbiClue: Space Crossword

Matt Mars

About this game

Explore the universe, one word at a time.

Turn your curiosity about space into a satisfying crossword adventure. OrbiClue: Space Crossword brings together astronomy, word puzzles, and a calm cosmic atmosphere in one offline game. Read the clues, connect the answers, and uncover the language of planets, stars, and everything beyond.

One purchase. Every puzzle included. No ads, subscriptions, or in-app purchases.

504 crosswords. A universe to explore.

Discover 504 English-language crosswords across 42 themed collections, featuring 1,107 distinct answers. Explore the Moon and Mars, giant planets, constellations, black holes, exoplanets, telescopes, spacecraft, eclipses, and more.

Choose a smaller puzzle for a short break or settle into a larger grid. These are connected crosswords with numbered clues and intersecting answers—not picture quizzes or hidden-word searches. Every letter you solve can help reveal the next answer.

Four ways to play

Campaign
Explore the puzzle collection and aim for up to three stars per crossword. Use checks and hints when a tricky clue leaves you stuck, then keep building your progress.

Zen
Enjoy crosswords without a timer or star ratings. Take your time, explore unfamiliar terms, and use unlimited hints and checks. Just you, the clues, and the pleasure of finding an answer.

Daily Orbit
Try the crossword selected for your local calendar date. Play offline and make space for a daily puzzle, without penalties for missing a day.

Time Attack
Race against the countdown with hints disabled. Put your space knowledge and solving speed to the test, then return to improve your best time.

All four modes draw from the same 504-puzzle collection, with separate mode progress.

Build your Discovery Notebook

Correctly solved answers become entries in your personal notebook, complete with definitions. Search your discoveries, revisit unfamiliar vocabulary, and watch your collection grow as you play.

Answers you have not discovered stay hidden, so you can browse your notebook without revealing unsolved terms. Turn each completed crossword into another step through the language of space.

Find your next challenge

Browse puzzles by theme, size, or progress. Revisit a favourite topic, tackle an unfinished grid, or choose Surprise me to open a random unfinished crossword.

Need a little help? Check a word, reveal a letter, or uncover an answer in modes that support hints. There are no hint packs to purchase.

Unlock 24 achievements as you explore the collection and develop your crossword skills.

A calmer corner of the cosmos

Settle into Deep Space, Midnight, or Nebula: three dark themes with clear text and contrasting highlights. Optional stars add a cosmic touch, while the clean, text-based layout keeps your attention on the crossword.

Adjust the grid size, enlarge clue text, and play with an on-screen keyboard in a portrait interface.

Enjoy short sound effects for typing, correct answers, hints, and completed puzzles. Adjust their volume, switch off countdown sounds, or play silently. There is no background music.

Your progress, ready to continue

Autosaving helps preserve your answers, settings, discoveries, and records between sessions. Save manually, create a local backup, or restore a backup when needed.

Your progress is stored on your device. Cloud sync is not included.

Made for offline puzzle sessions

No account to create and no internet connection required to play. All puzzles are available from the start, so you can explore the topics that interest you without buying extra level packs.

OrbiClue is entirely in English and combines familiar space vocabulary with more specialised astronomy and science terms. Whether you enjoy wordplay, love learning about the cosmos, or simply want a thoughtful screen break, take the next clue at your own pace.

Your next discovery starts with a word.

What’s new

Welcome to OrbiClue: Space Crossword! Explore 504 space-themed crosswords across 42 cosmic sectors. Play Campaign, Zen, Daily Orbit and Time Attack, discover astronomy terms, earn achievements and enjoy offline play.