How to play
Decode the cipher one letter at a time. Cross-reference the frequency table at the bottom of the screen.
Game features
- Sixty hand-built boards
- Built-in hint system, one cell per board
- Daily puzzle plus freeplay
- Save resumes per-board state
- Single-tap input on touch devices
- No real-money purchases
Editor review
Loop Sigma is a cipher-style word puzzle with daily and freeplay modes. The daily resets at midnight local time. The freeplay queue is endless. The format is familiar from other word-puzzle titles, and what differentiates this one is the frequency table at the bottom of the screen.
The frequency table acts as a tiered hint. New players use it heavily; experienced players check it once. That spread makes the format work across skill bands, which is rare for cipher games. Daily streaks save across sessions and the hint tokens regenerate hourly.
I played the daily for two weeks and a handful of freeplay boards on a Brisbane Brisbane ferry commute. The format suits the commute length; each board runs around six to twelve minutes.
The flaw is the dictionary. The word list is large but a few uncommon British-English spellings produced no-match errors on the puzzles I worked through. A localisation toggle would solve this. Two-and-a-half stars; the core format is fine and the dictionary issue is real for non-US players.
Mei Lin Chen covers Puzzle and logic games for Loop Arcade, based in Taipei.
Frequently asked questions about Loop Sigma
How do I play Loop Sigma?
Decode the cipher one letter at a time. Cross-reference the frequency table at the bottom of the screen.
Is Loop Sigma free to play in my browser?
Yes. Loop Sigma runs free in any modern browser. No installation, no signup, no payment required. Click the play button to load the game.
Does Loop Sigma work on mobile devices?
Loop Sigma runs in mobile browsers on iOS and Android with touch controls. Most puzzle games on AJ Arcade support both desktop and mobile, though precision-heavy titles tend to play better on desktop with a keyboard or gamepad.
Who reviewed Loop Sigma on AJ Arcade?
Mei Lin Chen reviewed Loop Sigma. Their full editor review appears above and their other coverage is available on their author profile.
Where can I find more games like Loop Sigma?
More puzzle titles are available on the Puzzle category page. Every game on AJ Arcade has been played and reviewed by one of our three reviewers before publication.