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One Line: Letters and Codes

Also known as One Line: Letters and Codes, ollac, one line letters and codes

You have just received a coded love letter! In this minimalist puzzle, you will have to draw a single line to fill the entire board. At each level solved, get a code to reveal a piece of the letter. Gather the codes, read the letter and discover the message.

Last update
24 May 2026
Players now
0

Latest update

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A New Exhibition Is Coming to the Mewseum!

Hello everyone! We’re preparing something very special for those who enjoyed Mewseum: Masterpieces. Soon we’ll be releasing the demo for Mewseum: Film Festival! A game where you solve puzzles to reveal famous movie post…

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Update history

Browse past updates and patch notes for this game.

12 updates

Gallery

In-game media

Achievements

Community progression

Top picks from 10 Steam achievements, sorted by player unlock rates.

  • 10 CardsComplete 10 levels82.3%
  • First pieceReveal 1 piece of the letter80.8%
  • 10 piecesReveal 10 pieces of the letter78.9%
  • 20 piecesReveal 20 pieces of the letter61.1%
  • 20 CardsComplete 20 levels61.0%
  • 30 CardsComplete 30 levels51.4%