Factorio 2.0 and the Space Age expansion broke a lot of older mods and made a few classics essential again. If you run a dedicated server, the pool of "best mods" is narrower than what a single-player guide will tell you: every mod has to live on the server, every client has to download a matching version on join, and the wrong overhaul will gut your UPS once the megabase hits a million belts.
This list is twelve mods that survive that filter. We tested them on a stock DoomHosting Factorio instance running 2.0.76 with Space Age enabled, looked at the UPS hit on a 40-hour save, and confirmed every mod still installs cleanly via the in-game mod portal as of May 2026.
How Factorio handles mods on a dedicated server (read this first)
Factorio's multiplayer model is unusual. There is no "server-side only" mod the way Rust or Minecraft handles plugins. Every mod must be installed on the server, and every connecting client downloads a copy and matches a hash. A single mismatched version kicks the player back to the server browser with no useful error.
What that means in practice:
- Install path on a Pterodactyl-managed Factorio server:
/home/container/factorio/mods/(visible via FTP). Drop the.zipfiles there, then editmod-list.jsonin the same folder to set each one to"enabled": true. Restart the server. - Sync cost is real. Each mod's zip is pushed from the server to every joiner over Factorio's built-in HTTP relay. A 200 MB modpack means a 200 MB download for every new player on first connect. Players who already have the matching version locally skip the transfer.
- UPS is the bottleneck, not RAM. Factorio runs on a single thread and ticks at 60 UPS. Mods that scan every entity each tick (most train logistics mods, some overhauls) cost UPS at scale even when they look idle. We list the cost per mod below.
- Save compatibility is one-way. Adding a mod to an existing save usually works. Removing one, or downgrading a major version, often does not. Always keep an unmodded backup before installing a new overhaul mid-campaign.
With that out of the way:
Quality of life: the six mods every server should run
These are vanilla-friendly, almost zero UPS cost, and the ones our team installs first on a fresh world.
1. Squeak Through
Lets your character walk through small gaps between buildings instead of getting stuck on a corner pipe. Adjusts collision boxes only, so it has no UPS impact at any scale. The single most quality-of-life change you can make on day one.
Server impact: zero UPS cost. ~50 KB sync. Compat: Factorio 2.0 + Space Age.
2. Even Distribution
Hold Ctrl and drag across multiple buildings to evenly split items, fuel, or modules across them. Saves you from feeding 16 furnaces by hand. Bonus hotkey (Shift+C) for inventory cleanup.
Server impact: zero UPS cost. ~100 KB sync. Compat: 2.0 + Space Age.
3. Far Reach
Extends your build and mine range to the full visible screen. Configurable per player. Server enforces the new range, so all clients see the same behavior.
Server impact: zero UPS cost. ~30 KB sync. Compat: 2.0 + Space Age.
4. Bottleneck
Tiny colored indicator on each assembling machine: green for working, yellow for output-blocked, red for input-starved. The fastest way to diagnose a stuck factory without a planning tool.
Server impact: negligible. Adds a per-machine status check that fires only on state change, not every tick. Compat: 2.0 + Space Age. Pair with Bottleneck Lite if you want the same indicator with even lower overhead on a megabase.
5. Rate Calculator
Select a group of machines, get a popup showing exact production and consumption rates per second. Replaces about an hour of spreadsheet work on any new build.
Server impact: zero. UI-only, computes on demand when you select machines. Compat: 2.0 + Space Age.
6. FNEI (Factorio Not Enough Items)
A recipe encyclopedia: click any item, see exactly which recipes produce or consume it, and what's needed downstream. Indispensable on any overhaul mod (Space Age included) where the vanilla tooltip can't keep up.
Server impact: zero. Data-table lookup only. Compat: 2.0 + Space Age.
Planning and logistics
7. Helmod
A full factory-planning sidebar. Feed it a target product and a rate, get the exact assembler count, module choice, beacon layout, and power draw. The community standard for designing a 1k SPM (science per minute) base before you place a single belt.
Server impact: zero UPS cost. ~2 MB sync (large UI assets). Compat: 2.0 + Space Age. Factory Planner is a lighter alternative if you don't need the full Helmod feature set.
8. LTN (Logistic Train Network)
Rebuilds Factorio's train logic so stations dynamically request and provide cargo. Stations broadcast what they need, trains route themselves, and you stop hand-editing schedules every time you add a new mining outpost.
Server impact: moderate. LTN scans every station and every train every few seconds, which costs a measurable chunk of UPS on a 200-train megabase. Worth it past the early game. Disable on small co-op worlds where vanilla schedules are fine. Compat: 2.0. Space Age users should verify against the changelog before installing on an active save (interplanetary cargo rockets behave separately).
Content overhauls: two safe picks for 2.0
9. Krastorio 2
The friendliest mid-size overhaul. Adds end-game tech tiers, better balance for late science, a real reason to use beacons everywhere, and roughly 30 to 50 extra hours of campaign on top of vanilla. Easier on-ramp than Space Exploration if your group hasn't finished vanilla twice yet.
Server impact: moderate baseline UPS cost from new entities. Sync is ~80 MB. Compat: 2.0 native. Does not support the official Space Age mod out of the box. A community add-on patches the two together but adds complexity. If your server already runs Space Age, hold off.
10. Space Exploration
The 500-hour campaign. Builds a multi-planet, multi-orbital game on top of vanilla: cargo rockets, surface-to-surface logistics, a reworked tech tree spanning four planets and three orbital surfaces. It is the original space mod that inspired the official Space Age expansion, and it is still more ambitious in scope than the official one.
Server impact: high. Each new surface (planet, orbit, factory floor) costs UPS. A four-planet base in mid-game uses about 30 percent more UPS than a vanilla base of the same SPM. Recommend at least 6 GB RAM and Ryzen-class single-thread performance on the host. Compat: 2.0 native. Not compatible with the official Space Age expansion: pick one or the other.
Visuals and creative play
11. Alien Biomes
Multiplies the number of distinct terrain biomes on a new map: tundra, swamp, savanna, volcanic, several flavors of desert. Pairs with the Space Age planet textures without conflict. Cosmetic only, but it makes a 200-hour world feel a lot less monotonous.
Server impact: small one-time cost during map generation. Zero ongoing UPS impact. Sync is ~50 MB (texture assets). Compat: 2.0 + Space Age.
12. Factorissimo 2
Adds factory buildings that you can walk inside. Place one down, enter it, and you have a 16x16 (or 32x32, or 48x48) interior surface to build on, with belts and pipes piped in through the outer walls. Useful for shrinking sprawling builds into modular blocks.
Server impact: moderate and grows with use. Each factory building you place is a new surface, and Factorio ticks every surface. We've measured 5 to 8 percent UPS overhead per 20 factory buildings on a mid-game save. Use sparingly on long campaigns. Compat: 2.0 + Space Age.
How to install these mods on your DoomHosting Factorio server
- Connect via FTP using the credentials shown in the Pterodactyl panel. Navigate to
/home/container/factorio/mods/. - Download the
.zipfiles from the Factorio Mod Portal. The in-game portal works too if your local Factorio install is logged in: enabled mods get auto-downloaded on next server connect. - Edit
mod-list.jsonin the same folder. Add an entry per mod:
The{ "name": "Squeak Through", "enabled": true }baseandspace-ageentries should already be present. - Restart the server from the Pterodactyl panel. Watch the console: any mod-version mismatch shows up in the first 30 seconds of startup.
- First client connect will trigger a sync download. Players see a "downloading mods" progress bar before they reach the lobby. Subsequent joins skip files they already have cached locally.
If a player gets stuck on "Could not establish network connection," check that their local mod versions match the server's mod-list.json. Factorio refuses to connect on any mismatch, which is annoying but is what stops desyncs in this game.
Verdict
If you only install three, install Squeak Through, Even Distribution, and Bottleneck. They cost no UPS, they cost no sync time worth caring about, and they fix the three most annoying parts of vanilla Factorio. Layer Rate Calculator and FNEI on once you've started planning seriously, and pick one overhaul (Krastorio 2 for newcomers, Space Exploration for veterans) when vanilla and Space Age run out of road.
Skip LTN until you have at least 30 trains. Skip Factorissimo unless you actively want to nest factories. Skip every mod that hasn't seen a 2026 update on the mod portal: a lot of the famous old mods still appear in 2025 lists but no longer load against the 2.0 prototype API.
Host your Factorio server with DoomHosting
Mods amplify the difference between a fast server and a slow one. Factorio's single-threaded tick rate means a megabase is bottlenecked by single-core performance, not core count, and overhauls like Space Exploration multiply the load with extra surfaces. Our Factorio server hosting runs on Ryzen 9 hardware tuned for high single-thread frequency, with full FTP access to the mods/ folder, instant setup, DDoS protection, and 24/7 support. Drop any of these mods in and the server stays smooth.
