Steam News13 March 20263mo ago

Version 6.13.3 out now

Hey everyone, version 6.13.3 has just been released. While this change log is not on the long side, the internal changes it covers are significant. As such, please get in touch when you run into any unexpected issues.

In this update3

Full notes

Full AirlineSim update

Read the full published notes in a cleaner layout. The original post stays linked below.

Repeated intro

Hey everyone,

What changed

0 fixes2 additions6 changes1 removal

Server
UI and audio
Fixes
Performance
Gameplay

changedChangedInterlining contracts do not require network planners if either of the partners operates no flights. Note that it can take up to a week for this to take effect on existing contracts.

removedChangedInterface language setting removed from user settings page. Language selector in footer is now the only way to change the language.

changedFixedUse airport display name rather than just city on airport arrival/departure boards.

addedFixedMore stable language selection for players joining the game through Steam.

changedFixedChanging the interface language as an unauthenticated user or a user without an airline in a game world would either have no effect or cause an error.

changedFixedLogo uploads exceeding the maximum file size limit would cause a “request rejected” error in the browser rather than an error message in the game interface.

AirlineSim changes

changedInterlining contracts do not require network planners if either of the partners operates no flights. Note that it can take up to a week for this to take effect on existing contracts.

removedInterface language setting removed from user settings page. Language selector in footer is now the only way to change the language.

changedUse airport display name rather than just city on airport arrival/departure boards.

addedMore stable language selection for players joining the game through Steam.

changedChanging the interface language as an unauthenticated user or a user without an airline in a game world would either have no effect or cause an error.

version 6.13.3 has just been released. While this change log is not on the long side, the internal changes it covers are significant. As such, please get in touch when you run into any unexpected issues. For more information, check out the most recent devlogs (2026-09, 2026-10).

Changed

Interlining contracts do not require network planners if either of the partners operates no flights. Note that it can take up to a week for this to take effect on existing contracts.
Interface language setting removed from user settings page. Language selector in footer is now the only way to change the language.

Fixed

Use airport display name rather than just city on airport arrival/departure boards.
More stable language selection for players joining the game through Steam.
Changing the interface language as an unauthenticated user or a user without an airline in a game world would either have no effect or cause an error.
Logo uploads exceeding the maximum file size limit would cause a “request rejected” error in the browser rather than an error message in the game interface.

Internal

Migrated away from deprecated logging API.
Upgrade to latest major versions of frameworks and libraries.
Initial implementation of writing API endpoints to support language change through new UI framework.
Switch to different embedded web server.

Source

Steam News / 13 March 2026

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