
Screenshots

Watch trailer on Steam ↗HexLemma
Geriatric Games · Published by Geriatric Games
Positive — 100% positive (11 reviews) · 20 achievements
Last updated 28 Sept 2026
Constraint-satisfaction puzzle on a hexagonal grid. Six clue families, eight board shapes, four difficulties, a 25-level campaign, infinite puzzle generation and a deterministic daily challenge shared by every player worldwide. Full controller support. Steam Deck ready.
£9.09
Lowest price we've ever recorded
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Price history
Casual · 2026 · More £5 - £15 games
About this game
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.
The clues compose. A Count tells you where 3s can land; a Pair-Differ narrows it further; a Vertex Sum rules out the last ambiguity. Every solve is an emergent chain you build, not a recipe you follow.
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.
A relaxation puzzle with teeth. Settle in.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-Bit
- Processor: Dual-core 2.0 Ghz or later
- Memory: 2 GB RAM
- Graphics: Potato - Vulkan 1.0 Capable GPU w/ 512MB VRam
- DirectX: Version 11
- Storage: 200 MB available space
- Sound Card: Any
- Additional Notes: Runs on integrated graphics. No discrete GPU required.
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
Latest news
Patch NotesOfficial
[b]HexLemma 1.14.3 is live[/b]
The whole game got a graphics overhaul. The stained-glass finish when you solve a board was always the game's best moment, so the rest of the game now lives up to it. New typography throughout (an inscriptional wordmark, elegant screen titles, one clean face for every number on the board), gold hairline accents echoing the win screen's leading, glass-plate panels with cut corners, hexagonal sliders and checkboxes (it is a hex game, after all), and a soft vignette that pools light behind the board while you play. Light, dark, and both colorblind palettes all carry the new look automatically. Solved pieces are set in filigree. Every cell you solve is framed in fine silver wirework: a border with scrollwork curling off each edge and a riveted joint at every corner, raised like real metal. Solve the whole board and the stained-glass finish re-sets each pane's wire from silver to gold as the color cascade reaches it; move the cursor over the finished mosaic and the gold glints with the light. Embossed cells got chiseled to match: faceted rims, sharp corners, cut stone under the metalwork. (Prefer bare cells? Settings has a Filigree toggle.) Buttons finally have hierarchy. Each screen's main action (Start, Apply, the Daily and Weekly starts, hardcore's Confirm) wears a gold-leaded plate, so your eye lands where your hand should go. Destructive actions read as red outlines. The in-game HUD became quiet glass plates that let the board breathe. Every How-to-Play page is now a live board. All ten pages: the seven clue types plus the three techniques. Read the rule, then do the rule, right on the page. The practice boards render at full board size and pin-sharp (Retina players, this one's for you), and every demo has a Reset button now instead of snatching the board away on a timer. Also in this build: Solved numbers draw larger and sit dead-center in their cells, and every badge label is optically centered. Dismissed N·V count pills fold into a small quiet circle instead of l...Read full article on Community Announcements (GeriatricMillenial)AnnouncementsOfficial
Fifteen updates in seventeen days
HexLemma launched on June 26. Seventeen days and fifteen updates later, it's a bigger game in every direction. Every bit of it is free, save-compatible, and already installed. If you've had the game since day one, here's everything you own now that you didn't then. The game teaches itselfInteractive tutorial. Three guided lessons played on real boards. The game highlights, explains, and waits for you to make each deduction, from your first adjacency strike to chained multi-clue reasoning. Offered to new players automatically, replayable from the menu any time. Playable stage intros. Campaign stages no longer introduce their new clue with a wall of text. Each intro is a short paged demo on a live mini-board: do the move, get the flash, hop straight into the level. Hands-on help. The How-to-Play technique pages traded their static pictures for live practice boards. Read about equality chains or the neighbor-clear gesture, then try it right there in the help screen. Something to chase every day and every weekWeekly Big Board. One huge board of up to 271 cells per week, the same for everyone, rolling over Sunday midnight UTC with its own leaderboard. The daily is your coffee; this is your project. Past dailies are open and ranked. Missed a day? Step back and play it. Your time posts to that day's leaderboard and counts toward your totals and 🔥 streak, and everything you'd already solved was backfilled automatically. Streaks & sharing. The Daily tracks your solve streak and gives you a one-tap, spoiler-free result to post anywhere. Solver ratings. Every puzzle now carries an objective difficulty rating (600–3000), and solving hint-free moves your own rating against it. Once it settles, your badge sits right on the main menu. Solving feels (and looks) betterThe stained-glass finish. Every solved board blooms into a one-of-a-kind mosaic: value-colored glass cascading out from your last move, a gold leading border embossing in over the top. A later performance pass made it ...Read full article on Community Announcements (GeriatricMillenial)Patch NotesOfficial
Stage intros are now playable — learn every clue by doing it (v1.12.0)
HexLemma 1.12.0 is live The campaign's stage intros are now playable. When 1.10 shipped the interactive tutorial, the wall-of-text stage introductions started looking… well, like walls of text. Fixed. Every stage now opens with a live mini-board: a line or two of copy, then you do the stage's new move on the real board — strike the odds off a parity cell, collapse a cell with an order arrow, commit the 7 a vertex sum forces. Success flash, board resets, try it again if you like. Stage 1 runs four quick pages covering the fundamentals; every later stage demos its new clue in seconds. And Continue never waits for you — skip straight into the level any time. One modal, not two. Stage intros used to chain into the full How-to-Play reference before your first level. That's gone — the intro teaches the clue itself now, and you land straight in the level. (How to Play is still in the pause menu whenever you want the full rulebook.) How to Play went hands-on too. The three technique pages — badge pinning, equality chains, clear-from-neighbors — swapped their static illustrations for the same live practice boards. Read the technique, then do it, right inside the help screen. Small print: backing out of a stage intro no longer counts as having seen it, so it'll offer itself again next visit. Demo players get the new intros for stages 1–2 as well. See you on the board.Read full article on Community Announcements (GeriatricMillenial)Patch NotesOfficial
Silky-smooth win screens & a weekly checkmark (v1.11.1)
HexLemma 1.11.1 is out — a quick quality patch for the two things you told us about this week. The stained-glass finale is now silky-smooth on huge boards. Finishing a big puzzle — especially a Weekly Big Board — could drag the solved screen's glass-and-gold finish down to a slideshow. The mosaic renders over 12× faster now, so the cascade, the gold leading, and the light following your cursor all glide at full frame rate, even on 271 cells. The menu now remembers your weekly triumph. Solve the Weekly Big Board and the main menu says so — Weekly Big Board ✓ — just like the daily. Mid-solve, it offers Continue Weekly instead. Keep the reports coming — this one was all you.Read full article on Community Announcements (GeriatricMillenial)Patch NotesOfficial
Interactive tutorial, Weekly Big Board & solver ratings (v1.10.0)
HexLemma 1.10.0 is rolling out now — and it's another big drop. The game now teaches itself. A brand-new interactive tutorial walks you through every deduction on real boards — three short lessons covering the basics, all four special clues (≠, even/odd, vertex sums, line counts), and the techniques that make big boards fall — including the answer to the eternal question: "I found the badge's matches… why is it still lit?" New players get offered it before their first puzzle; veterans can replay any lesson from the menu. Weekly Big Board. One huge board — up to 271 cells — every week, rolling over Sunday midnight UTC, with its own leaderboard, weekly streak, and shareable result. The daily is your coffee; this is your project. Solver ratings. Every puzzle now carries an objective difficulty rating (600–3000), and solving hint-free moves your own solver rating against it — clean solves climb, and no, you can't farm easy boards to inflate it (we checked, mathematically). Once it settles, your rating badge sits right on the main menu. The daily got fairer too: missed a day? Play any past daily and your time now posts to that day's leaderboard and counts toward your streak — and everything you'd already solved gets backfilled automatically. Hints are disabled on ranked solves (daily & weekly), share buttons behave, and the value-highlight chips moved to a tidy rail on the left. See you on the board — and on the new one, Sunday.Read full article on Community Announcements (GeriatricMillenial)






