---
title: "Factorio 2.1 server: what changes for your server"
description: "Factorio 2.1 has been stable since 23 October. Your server starts on it by itself and your 2.0 world loads. What changes, and what we fixed the same day."
url: https://tickserv.com/news/factorio-2-1
site: "TickServ (https://tickserv.com)"
lang: en
published: 2026-10-23
games: [factorio]
---
Wube marked **Factorio 2.1 as stable on 23 October 2026** (version 2.1.23), after a summer in
experimental. The studio calls it the game's last major update: no new planets, no new enemies, but a
long list of quality of life changes and polish.

## What changes in the game

The full tour is in Wube's [Friday Facts #449](https://www.factorio.com/blog/post/fff-449). What
matters most for a multiplayer game:

- **Mixed rockets**: one rocket can carry several different items in a single launch, and space
  platforms can trade items with each other in orbit.
- **Circuit network**: reads and writes can go to different wire colors. Handy, but it may break
  existing designs in your factory.
- **Space Age without Quality** in the game: the Recycler becomes its own mod, and Quality is no
  longer required to play Space Age.
- **Fluid mixing is blocked again**: two pipelines carrying different fluids no longer connect, and
  the game warns you.
- **Biter expansions** grow with evolution, instead of scattering lots of tiny nests.

## On TickServ: nothing to do

Your Factorio server fetches the latest game image **every time it starts**. That image moved to
2.1.23 on 23 October around 5 pm (Paris time), so any server started since runs 2.1. The port
(34197, UDP) and the location of your world are unchanged.

**A 2.0 world loads in 2.1**: Wube says so, and we checked it on a real server. A server that has
been running since before stays on 2.0. Steam has updated your players' games, so stop it and start it
again so they can join.

## What we fixed the same day

With 2.1, a server **without** Space Age still loaded the Recycler mod, which risked turning away
players who don't own the expansion. We spotted it within an hour of the release: since 5:45 pm the
same day, the Recycler follows your Space Age setting. Off without Space Age, on with it. Both cases
were tested on a real server before going live.

## What this doesn't solve

- **No going back to 2.0.** Once your world is saved in 2.1, it no longer loads in 2.0, and we don't
  offer to stay on the old version.
- **Space Age without Quality, not on TickServ yet.** Our Space Age setting turns on the expansion,
  Quality and elevated rails together.
- **Your mods need their 2.1 version.** A mod you uploaded for 2.0 can stop the server from starting:
  download its 2.1 version from the mod portal.
- **On the first start of a 2.0 world**, your dashboard may still show 2.0: that's the version of the
  save. It switches to 2.1 at the first save.

[Create your Factorio server](https://tickserv.com/games/factorio) · [The full guide](https://tickserv.com/guides/factorio-multiplayer-server)