Steam

SurLeFil

Also known as SurLeFil, s, steam:1645050

On the Wire is an educational game mixing science, history and humor. Follow ProfFil’s lessons, help Kelhann complete his missions, and discover the wonders of electricity, mechanics, and more.

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Last update

18 Jun 2026

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Latest update

Patch notesPublished 9d ago

v4.0v4.0 — The New Campus

A whole new campus The island has been rebuilt from the ground up — new look, new atmosphere, a living world to explore. Grudu welcomes you on your very first launch, Cosinus lurks in the campus pond with his usual sarc…

6 changesGameplayUI/audio

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Latest updates

Update history

Browse past updates and patch notes for this game.

22updates

May 2026
SLF Reborn 3.7 — The World is MathematicalThe World is Mathematical This release brings the long-promised decimals and fractions to the Math Corner, and extends Pythagor Hall to circles. — Math Corner — Decimals & Fractions — A full new wave of lessons and exam…Announcementv3.710 changesGameplayWorkshop25 May 2026
Decimals & Fractions: 8 new lessons, 20 new challengesWe've been hard at work on the next big content drop for SLF: 8 brand-new math lessons and 20 new challenges, all built around decimals and fractions — coming late May. Learners explore why a number breaks apart and how…Announcement2 changesGameplay17 May 2026
v3.6.0 — May 8, 2026 — Polishing the FoundationsThis release focuses on consolidating and refining what's already there rather than adding new buildings — making the existing experience cleaner, more pedagogical, and more reliable. Special attention was given to the…Announcementv3.6.08 changesFixBalance08 May 2026
Minor CorrectionsNew Scriptorium musical theme and few minor correctionsAnnouncement1 changeGameplay02 May 2026
April 2026
Scriptorium V1 beta — Update 28/04 Following early beta feedback, a fewScriptorium V1 beta — Update 28/04 Following early beta feedback, a few improvements: QR code is now bigger (300×300), easier to scan on smaller displays Scenario flow clarified: write your page first, then validate, th…Announcement#282 changesCompatibilityGameplay29 Apr 2026
v3.5.0 — April 26, 2026 — The Scriptoriuma brand new building dedicated to handwriting practice, inspired by the medieval monastic tradition and patroned by Alcuin of York, the scholar who reformed European writing under Charlemagne in the 8th century. A compl…Announcementv3.5.03 changesGameplayServer26 Apr 2026
Two new projects in development SLF continues to grow. Two major pieces are currently being built into the campus, and this trailer gives you a first glimpse of one of them — the Scriptorium. The Scriptorium & Historium…4 changesGameplayServerPatch notes23 Apr 2026
March 2026
Small Correction Patch for Build 3.4.0Small Correction Patch for Build 3.4.0 Thanks to Kastuk for the feedback.Announcementv3.4.014 Mar 2026
]v3.4.0 — March 13, 2026 — Geometry, Music & Developer Messagingv3.4.0 — March 13, 2026 — Geometry, Music & Developer Messaging Added the first playable geometry levels in the new Pythagor Hall, allowing players to construct and explore simple geometric shapes. New musical themes ha…Announcementv3.4.010 changesFixGameplay13 Mar 2026
February 2026
The Pytha Room Is EvolvingThe Pytha Room is evolving. Over the past weeks, I’ve been working on fully interactive geometry tools inside Sur Le Fil. The ruler, compass, set square and protractor are now functional and integrated into the Pytha Ro…Announcement2 changesWorkshop27 Feb 2026
January 2026
🔧 v3.3.0 — Progression & Kastuk V2 Update January 19, 2026📝 Exams Local file download for non-WebGL builds, avoiding browser-based downloads Added Professor intro voice lines for selected exams 🔌 Simulator Press E to quickly create a wire Fixed issues with the Add Wire / Exi…Announcementv3.3.019 Jan 2026

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