Pick a letter
Choose from the keyboard and drop it onto your grid.
Case study / game / 2026
Pick a letter.
Build a word.
Lettus is a free grid word game. Build words in every direction, score for every word on your grid and outscore an AI, a friend on the same screen, or a 1v1 online rival.
5×5letter grid
3ways to play
4players on one screen
0downloads needed
The idea
Simple to start. Hard to put down.
Lettus keeps the rules small: one grid, one letter at a time. The depth comes from direction. Words can run across, down and backwards, and every word on the grid counts.
It plays where people already are: free, in the browser, with no download. Sit down alone against the AI, pass one screen between two to four players, or duel a friend online.
How a round plays
Four moves to a win.
Build a word
Make words across, down and even backwards.
Score everything
Every word on your grid scores, so one letter can score twice.
Take the win
Fill the grid first. The highest score wins.
The ad
Free to play. No download.
Under the surface
Built for quick rounds.
- Three ways to playSolo against an AI, 2–4 players on one screen, or a 1v1 online duel.
- Every directionWord detection across rows, columns and backwards, with every word on the grid scored.
- React + TypeScriptA typed game-logic core behind a fast, mobile-friendly interface.
- Free to playOpen lettus.fun and start. Nothing to install.
Your move