HexLemma
Geriatric Games · 2026 · Casual, Puzzle, 2D, Logic, Relaxing
PC
1 user reviews100% · 1
This game is free to play. Get it on Steam →
Screenshots
About HexLemma
Sudoku meets Picross, on a hex grid.
HexLemma is a constraint-satisfaction deduction puzzle played on a hexagonal board. Each cell holds a hidden value from 1 to 7. Your job is to deduce every one — guided by six clue families that compose into intricate proofs.You never guess. Wrong moves are blocked before they can land. Every commit you make is provably correct, every elimination provably necessary. The puzzle is fair, and the proof is yours alone.The six clue families
- Pair-Same (=) — two distant cells share a value.
- Pair-Differ (≠) — two distant cells must differ.
- Order (<, >) — one cell's value is smaller than its partner's.
- Count (N·V) — exactly N of a cell's six neighbors hold value V.
- Parity (E / O) — the cell holds an even or odd value.
- Vertex Sum (Σ) — three cells meeting at a corner sum to a target number.
Three ways to play
- Campaign — 25 hand-tuned puzzles across five stages. Each stage introduces one new clue family. Start with the basics in Stage 1 (Foundations); finish on full-grammar Insane boards in Stage 5 (Capstone).
- Daily Challenge — one puzzle per UTC date, the same for every player worldwide. Compete on the Steam leaderboard.
- Random Puzzle — pick a board shape, difficulty, and seed. Eight board shapes (Hex Disk, Rectangle, Triangle, Parallelogram, Hex Star, L-Shape, Donut, organic blobs). Four difficulties from Easy to Insane.
Built for sitting with
- No timer. No mistake cap. Take five minutes or take an hour.
- Cloud saves across machines.
- Move replays for every puzzle you finish.
- 13 achievements across campaign progress, perfectionist runs, and daily streaks.
Coming Soon
- Localization: English, German, French, Italian, Spanish, Polish, Finnish, Norwegian, Swedish, Turkish, Portuguese (Portugal + Brazil).
- Themes: Four themes including two designed for colorblind players (deuteranopia + tritanopia).
- Full controller support with hex-natural six-way cursor navigation. Steam Deck ready. Partial support already baked. Working on control scheme optimizations.
What Steam players say
Recent verbatim reviews from Steam — separate from playze.io community reviews below.
HexLemma is one of those puzzle games that looks simple at first glance but quietly pulls you in with its elegant design. It’s a constraint‑satisfaction puzzle played on a hexagonal grid, built around six clue families, eight board shapes, four difficulties, and even a 25‑level campaign plus infinite puzzle generation for long‑term playability. Each puzzle gives you a hexagonal board filled with clues: numbers, symbols, or directional hints; each belonging to one of the six clue families. Your job is to deduce what number goes inside each hex until all the clues are satisfied. HexLemma is a wonderful find. It effectively blends the logic of Hexcells with the visual deduction of Sudoku, all set on a unique hexagonal grid. The goal is to deduce the hidden values (1–7) in each cell of the board. You are never asked to guess; instead, you rely on six different types of clues, such as comparing values between distant cells, checking parity, or calculating the sum of cells at a vertex. The game is designed to be fair, meaning you build your solution through a logical chain of proofs rather than trial and error, and it even alerts you from making invalid moves. What I truly appreciate…3 found this helpful
A fun and very well-designed logic game with lots of puzzles and nice graphics. The developer is extremely responsive; I had an immediate response to some suggestions for improvement.2 found this helpful
I'm not normally a fan of puzzle games, but decided to give HexLemma a try. First of all, the calming music is a huge plus. I would have normally thought that after a day's worth of solve problems for work, I wouldn't want to solve puzzles, but the music puts you in a serene state, allowing you to really just enjoy the game. The game is also surprisingly deep for such a simple game. You'll find yourself discovering little ways to gather clues to solve the puzzles as they grow in complexity. This adds a discovery dimension, which adds a separate sense of satisfaction, stacking on top of the puzzle solving. I haven't finished the campaign, and so far only have two puzzles completed with no mistakes, so I'm not very good, but the game excites me enough to where I can see myself resolving my past puzzles to get the 0-mistake achievements.
Community reviews
—
0 reviews
Sign in to write a review.
No reviews yet. Be the first to review this game.
