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.
Offers
What are keyshops?Multipacks (2)
About One Line: Letters and Codes
You just received a love letter! But it's written with codes...
To read it you will need to solve the puzzles and get codes, which will serve to reveal the words of the letter. Each code is a word. Can you decipher what is written in the letter?
Use your mouse or arrow keys to draw the line. Fill the entire board and solve the puzzle.
Did something wrong? You can go back easily. Or just right click to delete the line wherever you want.
After solving the puzzle you will get a code.
Find the code on the letter and discover the secret word.
Features
No tutorial. Straight to the game.
Minimalist design. No score, timer or pressure. Solve the puzzle in your time and enjoy the game experience.
40 unique levels, with progressive difficulty.
Get a code at the end of each level to reveal a piece of the letter.
Game details
Game details
Age ratings
Game modes
Features
One Line: Letters and Codes price history
Lowest tracked price: £0.67 (Jul 7, 2026) · current best: £1.69.
One Line: Letters and Codes player count & reviews
94% positive reviews all-time · 1 peak players in the last 30 days.
One Line: Letters and Codes — frequently asked questions
Where can I buy One Line: Letters and Codes at the cheapest price?
Right now the cheapest offer for One Line: Letters and Codes is £1.69 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price One Line: Letters and Codes has ever been?
The lowest price KingsPrice has tracked for One Line: Letters and Codes is £0.67 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
How many people play One Line: Letters and Codes?
One Line: Letters and Codes peaked at 1 concurrent players on Steam in the last 30 days (highest on Jul 25, 2026). The player chart on this page updates daily.
How can I get One Line: Letters and Codes at a discount?
Create a free price alert on this page and KingsPrice will email you when One Line: Letters and Codes drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
System requirements
Minimum
- OS *: Windows 7/8/10
- Processor: 2 Ghz Dual Core
- Memory: 4 GB RAM
- Graphics: Graphics card supporting DirectX 9.0c
- DirectX: Version 9.0c
- Storage: 300 MB available space
- Sound Card: Any
