A downloadable game for Windows, macOS, and Linux

[Version 4.5.4]        [Final Flash Build]        [release date: December 20th, 2017]

[ IMPORTANT: if you have problems opening this game, download the itch.io app and open Submachine Universe through that app - works like a charm :D ]

Submachine Universe is probably the first ever MSO (massively singleplayer online) created in 2010, extended ever since. You can freely travel between different locations, read theories about Submachine and observe how things work inside this network. There are locations that you might recognize from previous games, there's a lot of new yet undiscovered content, there are even locations that you think you know, but they're somehow different. Surely worth a look. The best part - it's an open project, which means I can add more locations later on and it will all work together smoothly. So, tinfoil hats on and start exploring if you dare, because there are some dark places inside.

[meanwhile, seven years later...]

In January of 2017 this project stopped being "free online" and morphed into "free downloadable", and here we are.

Please keep the file structure exactly as it is after unpacking. The main game file (subnet.exe / subnet.app / subnet.swf) needs the "sub_loc" folder along side it in order to work properly. Otherwise you'll just get a black screen after hitting the play button as the game won't be able to load any location ("sub_loc" folders contains all locations of this project).

If you downloaded a new version and want to use your save file from previous version, you have to keep the game in the exact same folder on your hard drive as the previous one. I know, it's kind of strange, but hey, there's flash for you. 

For this new, December 2017 update: I STRONGLY suggest starting a new game, since there are extensive changes to animations all over the place, which might mess up your previous save (some doors can be half-opened and inaccesible). 

If you feel like it, maybe consider supporting it on Patreon.


Please also notice that this is work in progress. 
It doesn't mean that it's unfinished, bugged, or pre-alpha. On the contrary.
It only means that it's expandable, and new content is being added regularly since June of 2010.
That means new locations, new puzzles, new storylines might appear in the future.
Check back from time to time to see if there's perhaps new version of this Universe for you to discover.

Submachine Universe is a companion exploration project tied to the Submachine series of point and click games.



Before comment: please make sure you don't spoil any locations to other players. Don't post location numbers, ok? Thanks!

Published Feb 13, 2017
PlatformsWindows, macOS, Linux
AuthorMateusz Skutnik
Tagsescape, Point & Click, secrets, skutnik, submachine
Average sessionA few hours

Install instructions

No installation needed, it's a standalone game. Just download and unpack it.

IMPORTANT: if you have problems opening this game, download the itch.io app and open this game through that app - works like a charm then.


Submachine Universe for PC (.exe) 85 MB
Submachine Universe for OSX (.app and .swf) 96 MB
Submachine Universe for Linux (.swf) 80 MB

Development log


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Viewing most recent comments 6 to 45 of 93 · Next page · Last page

Game development for the win!

actually I have began programming in C# and Unity, it turns out to be quite the fun and I was wondering if we couldn't use both of these programms to turn submachine into a 3D adventure game.

How is the idea Mateusz? Is it ok for you, if I try to make a 3D game out of it? Let me hear your comments :D.


Don't do it.

I will make my own game then-but it will be inspired by all the games that I have played .

just make sure it's your own work, not something created using my graphics or music.

It should be totally different - I am not going to use your graphics or music- I make my own for that.
The only thing I am not sure is how much you care about the story. I mean Submachine is your idea- therefore I can't name my game Submachine. I am just concerned about when I write the story that I have too much of the same. It sounds like a copy to me if I do a game based on another game - but it is still all by me - do you know what I mean? What about the Theories in the Subnet? Do I need a consent from  you or the people who wrote the theories to embed them into my game? A precaution is always that I can write your name and your game in the credits - but that's something that I have to ask you. 

I'd recommend writing something completely new. 

Using theories is totally a grey area where even I do not dare going to. :D

(Edited 2 times)

Here are some things I'd like you to add in the game when you re-upload it with GameMaker:

A location whose map and design are exactly the same as in S1. (Accesible through portal) (Add Karma Portals if you want)

The Ball from FLF, in 859.

A location inspired by Daymare Town.

(Edited 1 time)

I just wanted to mention that somebody who pronouces your name ''skutnik'' it sounds like ''sputnik''. Very similar, you can check that out on wikipedia. Very cool stuff. 
Also this person is doing a let's play of the submachine universe: 

I just thought it might be cool, because he's reading all theories.
Hf exploring the subnet.

How can I suggest a ''new'' theory in the universe? 

You can't. It's a finished project.

I understand

(Edited 2 times)

btw. Mateusz, you are awesome. Even you the creator of the submachine, the game, have to admit - this long project wasn't something you have possibly forseen- unless you are dealing with a karma arm- douh. You couldn't have planned all this, or do you? ... (dum dum dum...)
from the bottom of my heart  thank you for this game.
Submachine... will be continued...

Thanks and no, of course I haven't foreseen or pre-planned this. :D

Most of my creations have no ending yet when I start making them. 

(Edited 1 time)

It feels so surreal talking about a series to end...
When I first started to play the submachines, I was already 11 years old. When I had internet acces I was always looking for point and click games adventures- but there weren't many of them yet...I enjoyed point and click games when I was younger- Physikus- already heard of that game before? - A point and click adventure game dealing with topics in physics.
I love the concept of submachines, the art style, the machines, the complicated  stuff... everything just fitted together eventough it didn't look like they did , somehow it's like a big puzzle -this big game- just a big unsolved puzzle--- it was fun putting the puzzle together but it's sad when you actually finished it- you enjoyed it that much , you know? :D.
Submachine 1 was easy to play- Sub2 was already hard- Sub3 was impossible hard (because I didn't got the coordinates when I was young), 
- after 10 years now being 21- seing that to finish,..it kinda brakes my heart, but you know...with this series, it gradually gets better with time - my favourite submachines were 2,4,5,7,8,9,10 - because I spent most time playing them.
I also enjoyed covert front very much, eventough it had similarities to submachine- it was more active-
You just managed to catapult the point and click games to another ''layer'' in my opinion (;
I just wanted to say that I really really enjoyed the submachines and that I am looking forward to more point and click games - designed by you. Can you top the submachines? Can you make it even harder, better, more mind blowing?- Who knows?- Maybe after everything we have been through we were able to escape the submachines,...but after several thousands of years what will happen then? The submachine continously evolves - the time will come when the  machines are taking over and become human-  any time heard of the game ''detroit becomes human''- by Quantic Dream before? Funny, ...the protagonist in the story is names... wait for it... ''Kara''! Yes, Kara :D !
It is still being released-but this game is going to become big.

After playing the submachines I realised something...

But wait a minute... Isn't that just... an image on a computer screen?

*Computer shuts of*

there will be more submachines for sure.

only flash is ending, not the game itself.

Actually I have so many questions... do you mind to make a ''ask me'' video - about the submachine in general? I would like to ask several questions :D.
One of them is : have you watched contact (1997)? - because I see some resemblance in the submachine (don't want to spoil it) ... and have you played portal?- of course-,... but maybe SOMA? (recommend) - 

1. no

2. yes

3. yes


(Edited 1 time)

Well.It seemed the game is still updated. I'd like to buy HD version of sub10 but now I have trouble to use Paypal. Is there any other payment method?


Dear Mateusz Skutnik,

May I play this game online? My computer has the storage space of an Atari-a Commodore from just Microsoft Office. And now it is asking for a 6 GB update. So I can't even download either the Algodoo-Phun app, the Lego Digital Designer or even the Roblox player without serious lag. Please let this be available online to play.



But you do realise, that if it's online, those files would also have to be downloaded onto your disc, right? 

only into your internet cache.

So you might as well download it here. And maybe put in on a memory stick, will work that way as well.

32 d (LH) ---> 32y (LAB) , oh wow 1 day in layer one equals 1 year in another, what theory was it again... time dilation, moving, shifting layers?

you know the game is good, when the first thing you grab is a hammer...

but wtf man, who put's naphthalene in a pocket of a lab coat, shame on him- murtaugh has to go chemistry class, no safety glasses either... pfff

always turn of the gas handle when you are leaving,

Have you ever been to Kent, Mateusz?

also i love the root transporters because i want to see whats behind the walls, where the wires go, and where they split to other transporters.

i love this game so much it hurts. because its all tied together so perfectly i want to dig deeper.

What version works best with a Chrome OS? 

No idea. Try them all? :D

Well, it looks like the answer is: none of them. But this disappointment is nothing I'm not used to; very few games work on chromebooks. 

I'll go back to pining for a mobile version. 

Thank you for all the games. 

thank you so for the game...it's great fun and i've played a few times now, but i am intrigued by a note left by sdranger, regarding  "an easter egg in an easter egg"...could it be that there is some treat missed?  other than the rooms found by random(don't want to spoil them)...and, would it involve the third dragon or some other item?  tried weighing the companion stone on scales and such, but that did nothing...just wondering if we should be on the lookout for some secretive twist. again, many thanks.


I have the weight companion cube, but I don't know how to use it. What should I do with the weight companion cube? I have nothing to do about that item.

it's... your companion. It accompanies you. You don't use it for anything else.

I gather you haven't played portal, have you.

I'll delete this SPOILERY comment soon. 

Adding 12 cipher plates in Submachine Universe would be very nice. I would suggest using the transporters. I finished playing through version 4.5.4 and can I ask you a question?

Will you release Submachine Universe version 4.5.5?

I would be happy to see new locations in newer versions of Submachine Universe. Thank you so much! And I don't know how to use the weight companion cube.

I'll create more locations once I get to port this game to Game Maker, which will be several years from now. But not in flash. This flash version is done.


yep, looks legit. :D

looks awesome

completed the game,  as always: fantastic game mateusz.

How did you get around the issue you were having with 000 and the pipe room? I have the same issue


I just deleted the old zip file and downloaded a new one, it somehow didn't occur anymore. Maybe it will still occure, but I made sure, that everything was alright before I was going to play it again...

So you had to start all over progress wise?

(Edited 2 times) (+1)(-1)

yes, and it was a pain in the [location redacted], because I didn't save my notes.

(Edited 1 time)

In Linux: when I transmit, screen  was black! When I returm to main menu and back all be OK before new  transmit.

And scroll of texts works bad!

Is there any more updates coming for Submachine Universe? I finished playing through version 4.5.4.

There will be more updates in a few years when the game is ported to GameMaker, but this is currently the last update the game will see in Flash.

Hellooo! Happy Holidays! Thank you for the game! :D

I can't describe the following bug without mentioning a location; it's one of the very early locations, easily obtained, but still: 


which I'm going to fill with my system details:

MacOS High Sierra, Macbook 2017.

The sub_loc folder, the .app, and the .swf are kept together as in the zip.

I've temporarily disabled the Gatekeeper, or I wouldn't have been able to run the app itself, but I get the bug when I run the .swf file too.

I've started a completely new game, as advised. Everything is new: the sub_loc folder, the app, the swf.

Bug: In location 628, when I press the red button that should take me to an "alternate universe", all I get is a blank screen. The main menu keeps working, so I can quit the game for example, but I can't do any more in-game actions. I'd try to add a screenshot, but it would just be a black screen.


I'd be happy to provide more details, including a screenshot, if needed. I'm hoping it's just a case of Mur messing with a location file and Liz can persuade him to cease this prank.

hello...how did you get the app to work...i've tried everything...disabling and such, but no luck...can you dumb it down and walk me through it?  where do you keep the files, on desktop or app folder?  with swf, i can get the initial screen, but it won't load the others, and with the app, even with firewalls off and "any app download ok" it still doesn't work for me...and i have same system high sierra...thank you.

(Edited 1 time)

I keep the .app, the .swf, and the sub_loc folder at the same level, inside a SNEE folder which sits inside Applications.

And the only thing that worked for me was to drag and drop the .swf file in Chrome. (Opera and Firefox didn't work, got "file not found" or a blank screen.)

PS: Oh, and I also removed the old files from Applications. (I kept a backup, just in case, but not anywhere inside Applications.)

you can download itch.io app and play the game from under it. works like a charm I was told. :D

thank you for the response...finally got it to work with the itch.io app.  yay!

Adding a back pack in the submachine universe like in the exit, would be very nice.  I would suggest next to the bed, or just next to the computer.

I also have a question. Will you release Submachine Universe 4.5.5?

If you have finished playing through 4.5.4, you should know the answer to this question ;)

i have a question. when is where is 2018? coming out

this page is for submachine. but i think its already out

(Edited 1 time) (+2)

Please fix this bug:

At 000 the switches are meant to be up up up, after connection it still wont open because the start position was already up up up.

Same Problem in final area with that pipe thingy they should be all horizontal but they are already from the beginning . After switching it, it still doesn't do anything.

I know the solution to 000 changes with each game although I have yet to see up up up. I am just about to play through again using the latest download and will see if I get a problem in the final area; can you please give a bit more of a clue to which location you mean with pipes?

(Edited 1 time) (+1)

At ... after you got the switch,  and go in the karma portal at that location there is also a similar puzzle with horizontal and vertical lines, like in submachine one. I don't know what to call it, a pipe with three  regulators which leads to sort of a big container. The clue clearly says horizontal horizontal horizontal, but it is the same as the starting position. I tried every possible combination and it wont open for me 2^3=8. (There is Karma Light flowing out , when you have them vertically).  

I have completed the game a few times with different solutions for 000 but in 966 I always do the same thing and just open the 3 valves so that the container lids pops out. I'd never taken any notice of the position of the lines on the pipes above until I read your bug report!

I'm on Windows 10 and I have the same issue.

I have updated my zip file, I don't know if it will happen again.
Maybe my Download File was corrupted or something, because every time I started a new game, it had the same starting position and clue.

Having just played this game through to the end for the first time I wanted to say how enjoyable it was. Thanks so much for making it!

Evertime i close the game then come back and hit continue it start a new game or something

updated the zip file, works fine now.


my game is not saving


should work ok now.



I have the weight companion cube but I don't know how to use it.

I just completed the game and didn't use the Weight Companion Stone.

yeah, you can keep it. ;)

Will you release Submachine Universe 4.5.5?

Also an idea, you should be able to place one of the dragon toungues in the dragon statue at 992 and then remove it.

(Edited 1 time)

good idea.


Done. :D

Hello i found a visual glitch at 859: If youu click the reading book with all submachine pages swice realy fast you will get two books over each other and when you click continue your items will glitch and get stuck in the corner.  :)

Where do i post bugs is this the place im supposed to post them?

(Edited 1 time)

thx, looking into it.


found and fixed. Good find! Thanks!

New version coming up probably tomorrow.

Astounding work here, just finished playing through, made my holiday season!  Saving up the updates was definitely worth it, finding 19 separate locations in one go is like getting an entirely new submachine game!  I suppose I should go live my life now, lol, thank you so much for your dedication to this project, it means a lot!  Looking forward to the new year!


Yes, this latest expansion is game-sized.

I've played the Submachine Universe version 4.5.4.

Will you release Submachine Universe 4.5.5?

Enter 001 for the first time the right fence is open but the bell is the close state,plz fix this bug.



update coming up probably tomorrow.

(Edited 1 time)

tried to follow wizwardicuz's lead in opening with mac, but no luck...nothing shows up marked flash and if i try to simply dump into browser, a blank page shows up...when i put it in the app folder, it states that the certificate has been revoked...the privacy settings were set as suggested...don't know what else to do...any thoughts?

by the by, the swf shows up blank as well.

but, i am able to download all of the others successfully.

I guess Apple is just trying to kill flash for good.

idk...don't have any issues with other flash games, but thanks for the response.

iOS treasts them differently once they're actually downloaded and not in browser.

Try opening .swf through browser as shown in the thoubleshooting .txt.

i did...no go.  doomed to go without.


I have the same problem. :(

(Edited 1 time)

Now I have soap×2, weight companion stone, piece of chalk, tile B and tile C.I don't konw how to use them. I also don't  know why there is Japanese in location 314. It's we Chinese calculated π exactly long long ago, not Japanese.

items: wait for next update (December 20th)

314: point me in the right direction of Chinese symbols for this (preferably a similar image). 

(Edited 1 time)

Thank you for your reply. I have played your game since sub1 in 2007. It's difficult for westerns to difference Chinese and Japanese. I like sub4 best.

Sure, but can you show me the chinese symbols?...

Centre is 圆心  Radius is 半径  Diameter is 直径 Circle is 圆周   They are similar to Japanese.

thx :D

changes implemented.  :D


Sorry for posting locations. But you're doing a good work with your drawings about Submachine. I like your games and these updates are just amazing for sure and I hope to see more games from you.

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