A downloadable game

Shipwrecked on an alien planet, light-years away from earth - your
primary mission: survive. Explore the open-world of planet Xcylin and
dive deep into the underground facilities of an extinct race. Discover
countless items, weapons and block types to help you reach your ultimate
goal: to get back to earth and save all humanity in the process.

Exotic Matter is a single-player open-world voxel roleplaying game for
PC. It features a strong storyline on a fully simulated planet with
roguelike underground facilities. Exotic Matter's sophisticated facility
generation system ensures that no two missions ever play the same. And
it's fully moddable engine allows you to explore countless other planets
that were created by the community



  • A completely simulated planet to roam freely
  • Fully destructable/buildable terrain
  • Build your own shelters/bases with sophisticated in-game technology, connecting lights and doors with switches, pressure sensitive blocks and even in-game computer systems
  • Dig for resources deep below the surface
  • A vast amount of different block types await you, each with different attributes and abilities
  • Find hundreds of ancient items left on the planet by an old civilization
  • Craft new items in your inventory or use replicator technology to create even more complex items
  • Find, craft or replicate a multitude of weapons to protect yourself from the planet's alien lifeforms
  • Explore lots of dungeons created by a sophisticated dungeon generation system
  • A strong storyline to guide you trough the game
  • No two missions ever play the same
  • Customize the game via Javascript (modding) or build your own custom world type with just a few lines of code

(Please note that although these features are all planned for the game, they are all subject to change)

System Requirements

  • Intel Core i5 or i7 or comparable AMD CPU
  • At least 4GB of RAM
  • Dedicated graphics card like NVIDIA GTX560Ti / AMD R7970 or comparable with at least 1GB of video RAM.
  • at least 1GB free disk space
  • Windows
    • Windows 7 64bit
    • Windows 8 64bit
    • Windows 8.1 64bit
    • Windows 10 64bit
  • Mouse/Trackpad and Keyboard

Please note that there won't be a 32bit version of the game. If you don't have a 64bit Windows you won't be able to play the game. Also note that these are estimates, they will be refined in the near future.


We distribute the game over Steam as the game uses Steam Workshop to share game elements. You'll receive a Steam key with your order.

First Access

The copies for Exotic Matter's First Access have been sold out. The game will be purchasable again after the STEAM Release in May 2018.


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money wasted trash game

How is it going Moebiusgames? Everything ok?

Space Minecraft how I have looking for this for ages.

Purchase still disabled here on Itch. And the last update was only on Steam.

Does this mean you are no longer active on Itch?


Yeah there were some tax related problems with itch.io, so we disabled the purchasing here for now (EU tax law is a bit complicated). They changed something lately and I think it's now safe to re-enable it but I just didn't have the time to do it yet. But it's on my list ;)

Cool,  hope it will go smoothly.  In Germany so I have been told, taxes are so complicated no one really knows how it works exactly.


Yep - that's our tax system alright.

how many resources are in the game at the moment

Hi Axemall! At the moment there are 118 different block types and 47 different item types in the game. I plan to set up a wiki describing every item and block type in detail. Stay tuned!

can you do a small tutorial on crafting if there is any

Not yet - but I'll put that in the wiki as soon as it is live!

Hi there i jumped into the game as soon as you released it and my first impresion is you do have a game , once outside it way more fun i can see why you keep the version open for modders, can,t wait to see what is produced here

is it available yet i,m waiting patiently lo

Almost - I'm working hard on being able to release it as First Access next Wednesday. :D

fantastic you sure have been busy +1

looks like a cool game, maybe try reducing the price just a little bit and i will definitely think on buying it. and the steam version still isn't out, that is fine, but when do you think it will be out?

I saw in my feed you've updated the price, but there is no purchase/download button.

Just wanted to know if this was intentional or not.

I didn't update the price - I just removed the placeholder downloads for the First Access Release and that somehow also removed the price ;) But I'll add new files/keys for Steam when we do the release (in a few days).

The limitations of the Itch.io feed. I wish you all the best with your release with your game on Steam.

Thank you! :D

hey there can i ask about progress again anything new i should know off

Hi Axemall! We still plan on releasing in late July (if everything goes well). If you wanna stay up to date follow us on Facebook: http://fb.me/exomatter.game

hello this is april does the game go ahead or not

Hi Axemall - thanks for your interest in the game's progress. Yes the game is progressing well. We are currently adding a lot of items and new block types, making sure the modding interface is sound and creating the dungeon generation system. But still we are a few months away from alpha release.

You can follow the game's progress on twitter (@moebiusdev) or on our Facebook page: http://fb.me/exomatter.game.

thats great news just glad your still around

do you have a demo yet its been 8 month and nothing to test

sorry, we are not ready for a demo yet. But you'll be informed as soon as we go live - please be patient, the game is just a lot of work, and I don't wanna release something that doesn't show the game's full potential. Also, my offer of giving you your money back still stands.

Deleted post

Sorry, for some reason I didn't receive any updates from itch.io, so I overlooked your comments. I develop the game on my own, so it is a lot of work to keep track of everything. If you want your money back that can of course be arranged - but rest assured, that I'm working on the game day and night! Early-Access release is set for April 2017.

will the game be available this year

i have had the game 46 days now no sighn of devs or alpha

Why not disabling modding for the pre alpha, so people already get something to play when they buy it here?

In general this is a good idea, but Xcylin the game is also basically a mod, or rather a world template for the Xcylin engine, so I think disabling modding is not really an option. But I will look into it, maybe there is a way ...

i am really looking forward to this but i have bought the game to early why is there no pre alpha to play around in

We are working hard on Xcylin and could release an pre alpha version, but as Xcylin is moddable we don't want to release a version where the modding interface is not mostly finished. That would lead to modders being very disappointed when they need to completely rework their mods with later versions of the game. But rest assured that we will release Xcylin as soon as it is possible! :)

i understand that mabey i should take up moding, well atleast its nice knowing you will release something solid

hi i just purchased when will this be released to play

Thank you for your purchase. We plan an alpha release later this year.

Please follow us on Twitter (@xcylin or @moebiusdev) to get the release as soon as it comes out. Of course you will also get the final build, once we release it!

thanks for the reply i don,t use twitter but i will check back and forth for a release

I think you will also be informed via itch.io when we launch the alpha. :)

my intel hd4000 could run minecraft at a decent rate, how do you thing my intel hd5500 will handle this game?

Xcylin uses better textures, special liquid shaders and also uses blocks that are not cube shaped, so I think the hd5500 will not handle this game very well :/ But I'm working on low-end settings, so maybe(!) it will be possible that Xcylin runs at 30 fps on a hd5500 later in the development.


I think we will start seeing a lot of voxel based games popping up and the connotation to minecraft will soon disappear when people discover the vaster potential of these type of games.


This doesn't look very original...


I guess you think that all blocky games are like Minecraft, right? That is about as true as the statement that all RTS games are like Command & Conquer. I hope you will revise your opinion once you have the opportunity to play the game. :)


I suggest you make a demo in that case, cause at this point it is unclear what you are selling if it isn't a minecraft look alike. :)


Yes, you are right. I plan to release a demo version when the alpha is released.