It’s a big day for the factory-building community. Paradox Arc and Channel 3 Entertainment have officially pulled back the curtain on FOUNDRY Update 4: Rails & Reactors. Following a series of deep-dive DevBlogs, the showcase trailer has dropped, and it’s safe to say the scale of our voxel-based industrial empires is about to reach new heights—literally.
If you’ve been feeling the logistical strain of long-distance resource hauling, this update is the answer to your prayers. Here is everything you need to know about the massive changes hitting the game.
The Stars of the Show: Trains
The headline feature is, of course, the arrival of Trains. While conveyor belts are great for short-range spaghetti, they start to struggle when you’re tapping into distant resource patches. Update 4 introduces a robust rail system that includes:
- Customizable Rail Networks: Build everything from simple point-to-point shuttles to complex multi-track systems.
- Signals & Logic: Manage traffic and prevent collisions with a dedicated signalling system.
- Automated Scheduling: Set up routes, loading stations, and unloading bays to keep your factory fed 24/7.
Powering Up with Xeno Reactors
As your factory grows, so does its hunger for energy. The new Xeno Power Plant is a modular, high-tier energy solution designed to replace your ageing solar arrays and burners. This isn’t just a “place and forget” building; it’s a complex system involving:
- The Xeno Reactor & Fuel Mixer: The heart of the operation.
- Steam Generation: Utilising high-pressure turbines and cooling towers to maximise output.
- High-Voltage Upgrades: To support this new power surge, high-voltage cable ranges have been boosted to 24 units, making long-distance power grids much cleaner.
Construction Drones: A New Perspective
Building a massive megastructure from a first-person perspective can be a bit of a neck strain. Enter the Construction Drone. Unlocked early in the Science Pack 1 research tree, this remote-controlled buddy allows you to fly above your factory to place buildings and paint structures. It doesn’t require fuel, and while it has a maximum range, it’s a total game-changer for those who want that “god-view” precision without needing a jetpack.
Quality of Life & New Content
Beyond the big machines, Update 4 brings a heavy dose of polish:
- Info Overlay: A new UI mode that shows machine states and logistics bottlenecks at a glance.
- Neon Decor: For the aesthetic-focused builders, new glowing neon tubes allow you to give your factory that cyberpunk “after-dark” vibe.
- New Assembly Robots: Three new assembly line robots have been added to the Science Pack 5 tier, expanding your end-game production goals.
- Optimisation: The team has put in significant work on save-file optimisation and rendering, which should help those massive, chunk-heavy worlds run much smoother.
When Can You Play?
FOUNDRY Update 4: Rails & Reactors is available now (released April 28, 2026). Whether you’re looking to overhaul your logistics with a sprawling train station or finally stabilise your power grid with a modular reactor, there’s never been a better time to head back to the voxel frontier.
Pro Tip: If you’re loading an old save, keep an eye on your Shipping Pads. They’ve been reworked to handle one-way traffic more efficiently, but you may need to tweak your existing setups to keep things moving!
Are you excited to trade your conveyor belts for iron rails? Let us know your factory plans in the comments!
Find out more here – https://s.team/a/983870
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