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Watch trailer on Steam ↗plexum
Studio Jephinca · Published by Studio Jephinca
Last updated 28 Sept 2026
A third-person automation game driven by narrative progression. Build elaborate machines that feed an interplanetary network as you move from planet to planet.
£15.99
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Price history
Adventure, Simulation, Early Access, Casual · 2026 · More £15 - £30 games
About this game
BUILD FACTORIES. AUTOMATE PRODUCTION. THEN... ABANDON EVERYTHING!
Plexum is a third-person automation game where every planet is temporary. How temporary? You spend anywhere from 10 hours to 120 hours on a given planet.
10 hours seem too short? Only build what you need to: a miner here, a woodcutter there. Grab those resources for the next planet, through the network (depends on whether you unlocked it, but it'll keep accumulating!)
120 hours seem too long? Take your time exploring. Build elaborate factories. Gain experience. Find that deep ore, and then... put a miner on it for later!
Build increasingly complex production systems, extract their resources, survive their environment, and push your operation as far as you can before you're forced to move on.
YOUR FACTORIES STAY BEHIND... YOUR PROGRESS DOESN'T!
...
Got hooked? There's more info where that came from!
In plexum, you are taken by a mysterious technological marvel and carried across an ever-changing chain of planets.
Extract resources, design efficient production lines, and expand your capabilities — but nothing lasts forever. Each planet is a temporary opportunity, for both you and the marvel, to gather what you need.
As you travel, you’re forced to leave everything you built behind. Not all is lost, however — every system you create feeds into a larger progression, where planning, efficiency, and smart use of resources determine how far you can go.
plexum doesn't follow a fixed linear progression. Once you've learned the fundamentals, you're free to develop your own production systems, factories and planetary network.
How you approach each planet is up to you. Build only what you need and move on quickly, or stay for as long as you can and turn the planet into an industrial monster.
As it currently stands, the available content provides a few dozen hours of gameplay — and that will continue to grow as new content is released.
plexum currently contains 200+ item types and 40+ placeable objects, ranging from raw planetary resources and ores to manufactured components, machinery, tools and building parts.
Gather and process 37 different types of ores
Manufacture increasingly complex mechanical and electrical components
Produce assemblies and industrial parts
Build tools and machinery to expand your capabilities
Create production chains where one machine's output becomes another's input
Automate production as much as possible.
Production can grow from a handful of manually made items into elaborate chains spanning multiple tools, machines and processes.
Your production equipment won't always be able to operate in the conditions you find on a planet, and your production equipment can make those conditions even worse.
Construct factories from the ground up, using foundations, floors, structural frames, insulation, walls and roofs. Build and configure your production space and fill it with the machinery required for your operation.
Factories aren't just buildings - they're part of the production system itself.
Your tools affect the environment a factory has, while factory modules can be configured to keep those conditions under control. Manage temperature, atmosphere and other environmental factors to keep your machinery operating — and let the factory's waste spill out into the planet and deal with the consequences later...
Traverse a chain of distinct planets
Search for resources you need
Adapt your operation to different environments
Deal with differences in gravity, pressure, temperature and atmosphere
Decide where and how to establish your operation
No two planets are guaranteed to give you the same resources in the same places. A resource that was easy to find on one planet, might require considerably more effort to locate on the next, if it exists at all.
The first two planets introduce you to the fundamental systems of plexum through objectives.
Once you reach the third planet, the game becomes timer-driven.
The ship will eventually decide that it's time to leave, giving you anywhere from 10 to 120 hours before that happens. Every planet has its own window of opportunity.
When you leave, your buildings and machinery stay behind.
You don't get to spend hundreds of hours perfecting a single factory forever. The challenge is to make the most of the planet while you're there - and to make sure the work you do contributes to what comes next.
Leaving a planet doesn't mean starting from nothing.
Your experience, knowledge, production capabilities and planetary network from part of your larger progression.
As your operation develops, you'll move from gathering resources manually toward increasingly complex manufacturing and automation. A planet that begins as an untouched world can eventually become one part of a much larger industrial network.
plexum begins with a short introduction to its fundamental tools and production systems.
After that, there isn't a fixed sequence of objectives telling you exactly what to build next.
You decide what to produce, where to establish your operation, which production chains to develop, how much to automate and how far you want to take things before the ship moves you on.
There is no single correct way to build your operation.
With the current content in the game, there's a few dozen of hours of gameplay, different for every person / playthrough:
200+ item types
40+ placeable objects
37 mineable ore types
modular factories
procedurally generated planets
environmental conditions
resource processing and manufacturing
automation and production chains
farming, mining, woodcutting, metalworking and crafting
planetary resource networking
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10 (64-bit)
- Processor: Intel Core i5-6400 / AMD Ryzen 3 1200
- Memory: 8 GB RAM
- Graphics: NVIDIA GTX 1050 / AMD RX 560
- DirectX: Version 11
- Storage: 1 GB available space
- Sound Card: DirectX Compatible
- Additional Notes: Performance may vary depending on factory size and simulation complexity
Recommended
- OS: Windows 10/11 (64-bit)
- Processor: Intel Core i5-10400 / AMD Ryzen 5 3600
- Memory: 16 GB RAM
- Graphics: NVIDIA GTX 1660 / AMD RX 580 or better
- DirectX: Version 11
- Storage: 1 GB available space
- Sound Card: DirectX Compatible
- Additional Notes: Performance may vary depending on factory size and simulation complexity
Supported Languages
Latest news
AnnouncementsOfficial
A quick note
Hi plexians,I just wanted to post a quick note about our website: it is now fully operational, with a fully functioning encyclopedia and a sort of roadmap (altho I'm advised not to actually call it a roadmap) detailing where the game currently is, what is in development, and what is on the list of things that MIGHT (I was told to stress this) get into the game. No promises. No timeline. Just the general direction of what we see plexum becoming.You can find all details here: https://jephinca.studio/plexum/plexumSince we're still working on our data, there might be some discrepancies between what's in the game and what's on the site (there's a semi-direct link between the two) but when it comes to recipes and explanations, they should be about 99% done.Oh! Before I forget: for those of you who have tried the game, there are some discussions here on steam that have been posted. If you'd be so kind as to give some feedback, that'd be awesome. Now, off you go! Build your factories, lock yourself up inside of them (or... Put an airlock ) and fill it with some tools. With your trusty encyclopedia at your side. And... Don't forget to look at the time!Stay plexum!Read full article on Community Announcements (Sume)Patch NotesOfficial
generic content update #2
Bullet point summaryFurther enforced existing factory rules and regulations:factories now inform you of the floors, walls and roofs placed, as well as whether the factory is complete.fixed some issues with the required face count.made factory save/load more robustfixed a number of bugs and issuesfactory expansion is now out:tools now affect the factory environment: tools that use heat will increase factory temperatures, a certain number of tools increase atmospheric particles (and thus the atmosphere number) of a factory environment.2 factory modules will now stop and reverse the increase of temperature and atmospheric particlesyou're able to put these modules on the roof of a factory that is completePreviouslywhen a factory was placed before, you thought you were done. You'd drop in your tools, you'd be able to let them run indefinitely and collect the resources in your storage tools.Nowthis is now a thing of the past! With the recent updates, you build your factory just as before, place your tools, and you'll quickly notice that the environmental conditions in your factory start to deteriorate. Temperatures increase, atmospheric density builds up. Not the perfect conditions you thought you'd be able to keep.But have no fear! The ship provides you with some factory modules you can place on top of your factories:a thermal factory module will bring down the temperature as required, based on the settings you feed it.an atmospheric factory module will bring down the atmospheric density as required, also based on the settings you feed it.Simply pop those modules on a roof, and it will start working on your perfect factory. As with everything in plexum, however, you'll notice that the modules have some limits, so... more to come soon!LaterRoads, vehicles, vehicle depots, vehicle stops. They're the future of bringing your goods from factory to factory, giving you some extra free time for exploration and mining. When exactly this update will come? no one can tell for sure....Read full article on Community Announcements (Sume)AnnouncementsOfficial
plexum demo
Less than 24 hours remain on the introductory offer!The plexum Demo is now available. It contains the same game as the full version, allowing you to explore, gather resources, build, automate and see what plexum is all about.The only major difference is that the Demo does not allow you to save your progress. You can play as much as you want, but once you leave, your progress is gone.If you want to keep your progress and continue building your planetary operation, pick up the full game while the introductory offer is still available.We've also been working on our website (jephinca.studio) to include more information on plexum, with even more still to come in the coming days/weeks, as development on the game is still in full swing.Thanks for checking out plexum!Read full article on Community Announcements (Sume)Patch NotesOfficial
generic content update #1 (aka Introduction to factories)
Bullet point summaryadded 55 new recipes, bringing the total from 67 to 122 recipesadded the factory building system which introduces a fully enclosed, sealed factory detection.added the airlock module and environmental interfaceadded factory-specific environmental conditions that mirror the planet (temperature, pressure, atmosphere and gravity)added 5 new processable materials: aluminum, lead, silicon, zinc and alu-zinc.added a complete industrial manufacturing chain with molds, foundations, sheets and specialized industrial partsadded several new manufacturing machines, including the molder, caster, and stamper mk1added a large number of new industrial components required for factory constructionrefactored environmental, factory and placement systems to support enclosed structures and future factory gameplaylaid the groundwork for future factory hazards and specialized environmentsToday sees a significant content update. Let's compare! Before before today you were relying on one single path of making tin items:gather ores with a miner,process ores with a crusher,melt powder into ingots,from there make a few dozen different items, raging from plates to more specific things such as tubes, connectors and hinges.NowNow, we have an extra branch to make more industrial parts.Ores are still gathered with the Miner and processed by the Crusher, but from there a second production path opens up... there are 2 molds to make: foundation and sheet, with a molder. Next, we put the two together to make foundations and sheets with the caster. We can then further process the result of this into a stamper mk1, which is a bigger version of the stamper tool and process the resulting items further into specialized items in the manufactory. Oh, and it's not just tin that you're able to process from now on: aluminum, zinc, lead and silicon are among those that you're able to process, opening up some new possibilities. It doesn't stop there: the resulting specialized items can be used to...Read full article on Community Announcements (Sume)AnnouncementsOfficial
Plexum 101: from ore to item
In plexum, resources go through an extensive production process before they land in your inventory. The journey starts with you, the player, exploring planets to find those resources. With the help of your trusty scanner, you're able to permanently mark ores on your map, allowing for an exploration-first, work-later mentality.When you finally do get to work, and the ship hasn't dragged you off to the next planet before you even did, you'll start by manually gathering some tin ore and putting it in a furnace. Once you've gathered enough ore to make a few ingots, you're able to — if you've got the other required items — place your first miner tool.A miner tool is your gateway to automation. Feed it some fuel (coal or wood will do) and it will take over the tedious bit you just had to do yourself.From there, you'll soon have a tin chain empire standing in front of you (or... next to you, depending on how you're turned). It is advised to process tin ore into something more workable, however. Crusher tools will aid you in this endeavor. They will take the ore, turn it into crushed ore and tin powder, which you can then feed into the stone furnace with. Swinger arms will be your friend in this empire: they put resources from one tool into another.The stone furnace can make two types of products: a tin ingot and a tin bar, each opening up their own recipes. Feed a tin bar to a roller tool, and you're making tin wires. Feed an ingot to a stamper, and it'll provide you with 2 tin plates.Further down the line, you'll have a precision tool, control unit tool, precision unit tool, and my personal favorite: the heating precision unit tool, which will each make their own products out of previously made tin products, ranging from connectors to hinges, thick plates, shock plates, sheets, blades, tubes, and more.And this is only the start: these items are required to make more tools, which in turn make more items. But don't worry: it's all pretty self-explanatory. For the most part....Read full article on Community Announcements (Sume)
