Early Access
Is SurLeFil still being updated?
Yes, but updates are hit or miss. Last updated yesterday, with about 2 updates per month.
Last checked Oct 22, 2026
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About the game
Sur Le Fil is a free educational game: math, geometry with compass and set square, handwriting recognized by a neural network, electric circuits on a real electronics simulator, robot programming, the history of science. A 3D campus full of humor, with ProfFil and Kelhann. No ads.
- Casual
- Free To Play
- Simulation
Update history
Recent updates
Oct 20, 2026 · Patch note
Sur Le Fil 4.4: Prof shows you how (opens in new tab)
In the Grading Den, Prof can now solve an operation in front of you. And building circuits in the simulator gets easier. Prof shows you how Show me: in assisted mode, the Grading Den has a "Show me" button for additions, subtractions, multiplications and divisions in columns. Prof solves the page out loud, with the words of the lessons, and writes each digi…
Oct 20, 2026 · Build
Public branch build 26085115
Latest build time Steam reports for the public branch.
Oct 6, 2026 · Patch note
Sur Le Fil speaks Portuguese (opens in new tab)
Olá! Brazilian Portuguese joins French, English, Spanish and German. Every menu, every lesson and every line of Prof's voice now exists in Brazilian Portuguese. Choose "Português" in the language menu. If Windows is set to Portuguese, the game starts in Portuguese. The Scriptorium is still in French and English only: in Portuguese, Spanish and German it ope…
Sep 27, 2026 · Patch note
Small fixes (opens in new tab)
After a message from soso (thank you!), I replayed the electricity lessons and fixed what was getting in the way: Power and overheating: clear instructions while the resistor heats up, and the missing "start the power supply at 6 volts" step. You can now build ahead of Prof: wires and parts placed early are counted. Right-clicking a wire no longer stops you…
Sep 27, 2026 · Patch note
Sur Le Fil 4.2.3 — small fixes (opens in new tab)
A small update. Creating a profile now tells you what's wrong: the message was hidden and you only heard a ding. The fields show what to type, and a few texts stuck in French or English are now translated into all four languages. On the profile form, the red cross now simply cancels.
Questions
When was the last SurLeFil update?
SurLeFil last posted a patch note yesterday (Oct 20, 2026: Sur Le Fil 4.4: Prof shows you how (opens in new tab)).
How often does SurLeFil update?
It got about 2 updates per month over the last year and is irregular (51/100). 8 of the last 11 months had at least one update day. Not enough of a cadence to call it regular.
Is SurLeFil abandoned?
No. It shipped a build or patch note within the last 90 days, though updates are hit or miss.
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