Alchemy Factory Patch Notes: Hotfixes v1.0.4950, v1.0.4940 & v1.0.4930

Quick Answer: Launch Week Hotfix Rundown

Alchemy Factory left Early Access on September 8, 2026, and the development team shipped three hotfixes in the days immediately after launch: v1.0.4930, v1.0.4940, and v1.0.4950. This guide breaks down every change in each patch, what it fixes for your shop, and the one infrastructure change self-hosters need to know about: the multiplayer port moved from 27015 to 27510.

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Hotfix v1.0.4950: Track Sorter Routing and Pre-1.0 Save Unlocks

The newest hotfix of the trio concentrates on factory logic that misbehaved after the 1.0 transition and on quality-of-life clarity in the multiplayer lobby and the in-game Manual.

Issue	Resolution	Player Impact
The mirrored version of the Track Sorter had opposite route selection results	Route selection on mirrored Track Sorters now matches the expected branch	Mirrored sorter setups no longer send goods down the wrong line, so blueprinted mirror layouts can be trusted again
Branches of Track Sorters were hard to read	Added clearer indicators for the branches of Track Sorters	You can verify each output route at a glance before wiring a sorter into a production line
Workbench, Checkout Table, or Trash Barrel could have no way to unlock in old saves from before 1.0	Fixed the unlock state for these objects when loading pre-1.0 saves	Long-running Early Access saves no longer soft-lock core shop infrastructure
Server names could display incorrectly and player counts could appear as negative numbers in the multiplayer lobby	Fixed lobby display of server names and player counts	Server browsers read correctly, making it easier to identify and join the right co-op session
Unreal Engine 5’s NNE could prevent some players from launching the game	Disabled NNE	Players whose hardware triggered the NNE launch failure can now start the game normally
The NPC handling Recognition applications was hard to identify	Added clearer indicators for the NPC who handle Recognition applications	Less time searching the town for the right clerk when you file a Recognition application
Shop Reputation documentation was outdated	Updated the Shop Reputation section in the Manual	The in-game Manual now reflects how shop reputation actually works in Version 1.0

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Hotfix v1.0.4940: Blueprints, Upper Floors, and Multiplayer Stability

Hotfix v1.0.4940 targets the blueprint workflow, customer pathing across multi-floor shops, and multiplayer reliability.

Issue	Resolution	Player Impact
A new Blueprint could not be created after editing an existing Blueprint	Fixed blueprint creation after editing	You can edit a Blueprint and immediately draft a new one without restarting the workflow
Customers could not properly reach upper floors	Fixed customer pathing to upper floors	Multi-story shops now receive full customer traffic on every sales level, protecting revenue from upstairs displays
Multiplayer sessions could crash	Fixed an issue that could cause crashes in multiplayer	Co-op sessions run more reliably, reducing lost shop progress mid-day
Lobby latency readings were imprecise	Improved latency detection in the multiplayer lobby	Server listings show more accurate connection quality before you commit to joining

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Hotfix v1.0.4930: Save Loading, Port Change, and Stair Pathing

Hotfix v1.0.4930 is the foundation patch of launch week, addressing save performance, connectivity, and customer navigation.

Issue	Resolution	Player Impact
Large save files could take a long time to load	Fixed slow loading for large save files	Long-running factories with extensive layouts load into the session noticeably faster
Players could not directly invite Steam friends to join non-public rooms	Fixed direct Steam friend invites for non-public rooms	Private co-op sessions work as intended for friend groups who want a closed shop
A Spanish translation error shipped in the 1.0 launch build	Fixed the Spanish translation error	Spanish-language players see correct text instead of mistranslated strings
The game could not launch when port 27015 was already in use	The port has been changed to 27510	Launch failures caused by port conflicts on shared or hosted machines are resolved
Customers could get stuck at the bottom of stairs	Fixed customer stuck states at the bottom of stairs	Foot traffic flows through stair-based shop layouts without jamming the entrance path

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Port Change Callout: 27015 to 27510

The single most operationally important change in launch week is buried inside hotfix v1.0.4930. Before the fix, Alchemy Factory could not launch when port 27015 was already in use, which is a common scenario on machines running other game servers or multiplayer titles. Rather than patch around the conflict, the developers moved the game to port 27510.

What this means for different players:

• Standard co-op players: Nothing to do. Steam matchmaking handles the new port automatically.
• Self-hosters and LAN players: If you wrote a firewall rule or port forward for port 27015, update it to 27510 or hosting will fail on the new build.
• Dedicated or shared servers: Any service that reserved 27015 can keep that reservation. Alchemy Factory no longer competes for it.

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How to Apply the Hotfixes

All three hotfixes ship through the standard Steam update channel for AppID 3669570. Steam applies them automatically when the client is online; if you play in offline mode, launch Steam online once to pull v1.0.4950 before your next session. After updating, load your existing save and the fixes apply on the spot, including the pre-1.0 unlock repair for the Workbench, Checkout Table, and Trash Barrel in v1.0.4950.

If any of the fixed symptoms persist after updating, the likely cause is a stale installation, so verify your game files through Steam before investigating further.