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E9uations

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About E9uations

E9uations is a single-player Sokoban-based puzzle game built around arithmetic. You control the equals sign, moving it to position numbers and operators and complete equations. When an equation connects, it is calculated automatically and the result appears on the other side.

Solve the puzzles

Connect a number to an octagonal target with the same value to make both disappear. Clear all targets to finish each puzzle. The game uses only the four basic arithmetic operations, and its puzzles do not require complex mental math; each calls for its own insight.

Chapters and hints

The puzzles are arranged into multiple themed chapters. Easier and harder puzzles are separated within each chapter, so you can progress non-linearly. Hints are available for most puzzles and present simpler versions that share the same core idea.

Puzzle features

  • More than 160 handcrafted puzzles
  • Unlimited undo

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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