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One Line: Letters and Codes

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About One Line: Letters and Codes

One Line: Letters and Codes is a puzzle game about deciphering a coded love letter. You solve puzzles to earn codes, then find each code in the letter to reveal a secret word.

Solve the puzzles

Use the mouse or arrow keys to draw a line that fills the entire board. If you make a mistake, you can go back or right-click to erase the line from any point. Each completed level gives you a code that reveals part of the letter.

Levels and design

The game has 40 unique levels with progressive difficulty. It has no tutorial, score or timer, so you can solve each puzzle at your own pace.

Frequently asked questions

Buy One Line: Letters and Codes 55% cheaper than on Steam.

One Line: Letters and Codes is available for 55% less in shops such as YUPLAY or Instant Gaming.

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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