Sirius Online is a unique, easy to play Space Action Shooter with Multiplayer components and ongoing progression. Join the Ranks of the Terran Reclaim Forces or the Sirius Colonial Council today and fight for your Faction! Explore forgotten battlefields, find Treasures, create an empire with your friends and rule the universe!
All Reviews:
Mostly Positive (71) - 73% of the 71 user reviews for this game are positive.
Release Date:
Jun 1, 2015

Sign in to add this item to your wishlist, follow it, or mark it as not interested

Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Early Access allows us to spend more time on features and bug fixes while also listening to player feedback and implementing it before the game moved along too far and the product ends up being no fun.”

Approximately how long will this game be in Early Access?

“Our Goal is to have a finished game towards the end of 2017, but we can't promise that it'll be done by that time exactly.”

How is the full version planned to differ from the Early Access version?

“The Early Access version is currently in Alpha
Sirius Online is currently in Alpha, which means that many bugs are to be expected, core gameplay elements can change, features are missing or might even be removed and so on. Our plan for the full release is:
  • Cross-Platform (Linux, OSX, Windows)
  • Mouse & Keyboard and Full Controller Support
  • Single- and Multiplayer, Dedicated and Listen Servers
  • Modding Support (Ships, Stations, Planets, Sectors, etc)
  • ... (and more)
This list may change during development and is not final or a promise that any of these will make it in.”

What is the current state of the Early Access version?

“Sirius Online is in Alpha, so bugs, glitches and downtime are to be expected.”

Will the game be priced differently during and after Early Access?

“This will resemble final Price of the Game”

How are you planning on involving the Community in your development process?

“We actively read reviews, feedback, comments and forum threads and respond to them. If you encounter a bug, have feedback, an idea or a suggestion do tell us and we will happily read and respond to you.”
Read more

Buy Sirius Online


Recent updates View all (98)

August 4

New Engine and Update Hiatus

Hello Everyone,

Today we are announcing that all future updates for Sirius Online are now on hiatus while the game is move to Unreal Engine. There are many reasons for this as Dex will explain below, but we are confident that changing to Unreal Engine will make Sirius Online even better than ever!

If you have any questions, please ask them in the comments below and we'll answer as soon as possible. Remember that Dex is the sole developer of Sirius, so development will take time, but will always be the highest quality content and improvements. Thank you all for playing and supporting Sirius Online and we hope that you continue to do so in the future.

Hello Players,

Sirius is currently based on a very old Engine called Blitz3D. We extended and exceeded the lifetime of thin engines by over a decade, with it featuring technically impossible feats, like godrays, glow and gaussian blur. But one can only go so far until you hit a wall. This wall has been reached. Blitz3D only supports up to 2GB memory, with it starting to drop assets and performance beyond the 1.6GB mark. With all the new features that have been coming recently, I had to cut down some other assets from the game (like taking down 33% of the AI Chatter) and severely crippling a few textures. DirectX 7 is way past its predicted Lifetime and it is time to acknowledge that, even for an oldtimer like me.

The Engine behaviour is neither satisfying nor futureproof and so I faced the decision of "making it work somehow" and cancelling 1.3 and get to learn another Engine. For me, any other modern Engine is a brand new way of writing and assembling code and assets. So I need some time to work myself through the tutorials, make some smaller games to get accustomed to the Engine and learn the ins and outs of it. This obviously may take longer than expected, so I will try to keep you up to date with progress reports once a month and maybe some screenshots.

What this not means is that Sirius will End now, but much rather get a larger hiatus in terms of content updates. I will supply bugfixes and QoL updates to the Blitz3D Version until the new Engine powered Version is ready to take over, but for now, the update frequency will drop further down. If you feel like supporting the Porting, consider adding some of your hard earned income to the pool in the Patreon: This might even enable me to hire additional coders to get the port done faster. This, however, is entirely optional.
5 comments Read more

July 15

Sirius Online 1.2.1a - Hotfix deployed

Hello fellow Freelancers!

We have deployed an emergency hotfix for some issues discovered by users! Thank you for reporting bugs, again!

The following issues have been resolved:
- Asset Flicker after some Play Time
- Memory and Artwork Cleanup
- Less RAM Footprint

Also, a new Feature joins the game:
- New Sound Engine, switching music to combat tracks in fight.

I hope this update resolves the issues reported,
1 comments Read more
See all discussions

Report bugs and leave feedback for this game on the discussion boards


“Sirius Online will become memorable for all the right reasons.”

“[...] this is very fun and I cant wait to see where it is going to go.”

“I went into this expecting nothing and I got a great early access Freelancer like MMO.”

About This Game

War. A never ending source of waste. A never ending demand for more lives and resources. The Year is 2436, and humanity, once again, wages war on itself. Nearly a hundred years ago we settled on the Sirius Star System, a rich system with two habitable planets. The first Settlers, now forming the Sirius Colonial Council built this ecology from the ground up. They self-governed and prospered. Five years ago, the Terrans appeared, demanding to return the Control over the System. Failure to do so would result in catastrophic response from the Terran Reclaim Forces.

And so, once again, war erupts.

Take part of the war or live along both sides, trade, fight, think and explore. Be the tip at the iceberg of the upcoming conflict. Control the Economy with your Trading Craft. Find unimaginable riches in the 11 AU wide Sirius Star System. Battle Pirates and even more sinister forces. Create your own Empire among the Stars.

Sirius Online 1.2 - Rise of the Crimson Dawn

It was an accident. Or so they say. One day, the Research Station from the Sociecty of Advanced Technology, a neutral Faction dedicated to research the effects of AGI, vanished. Well... in an explosion. From that day on ships of unknown origin invaded, attacked traders, attacked explorers, abducted people. Always leaving only fragments of data. Fragments that say "...remember the Crimson Dawn". We never gave them much thought. Another Lunatic, fallen to space sickness, painted his ship in odd colors, attempting to kill people until stopped.

It was too late to realize that these were not loners. That these were not unorganized. That these seek to end all human life in this star system. When the first Megacarrier with countless of AI Drones arrived, programmed to speak with the voices of our loved ones, we realized: THEY were the Crimson Dawn. And they have risen. To end us.


  • Explore an 11AU big Star System, with a living economy and hidden riches
  • Take your Side in an Endless war between the SCC and the TRF. Defend your Homeland or take it back for Earth
  • Influence a steadily changing market of supply and demand and work your way up to bigger ships
  • Survive the onslaughts of an unforgiving AI assault destines to kill everything living.
  • Be a part of an ever evolving universe

System Requirements

    • OS: Windows 7 or newer
    • Processor: Intel Dual Core 2.80 Ghz, AMD Dual Core 3.0 Ghz or better
    • Memory: 4 GB RAM
    • Graphics: Direct3D 10 or OpenGL 3 compatible Graphics Card
    • DirectX: Version 10
    • Network: Broadband Internet connection
    • Storage: 2 GB available space
    • Sound Card: Not necessary
    • Additional Notes:
    • OS: Windows 10 release or newer
    • Processor: Intel Dual Core 3.00 Ghz, AMD Quad Core 3.5 Ghz or better
    • Memory: 8 GB RAM
    • Graphics: Direct3D 11 or OpenGL 4 compatible Graphics Card
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 4 GB available space
    • Sound Card: HW-Mixing and HW-Buffers supported
    • Additional Notes:
Customer reviews Learn More
High Volume of Reviews Detected:
Exclude  or  View Only
Review Type

Purchase Type


Date Range
To view reviews within a date range, please click and drag a selection on a graph above or click on a specific bar.

Show graph

Display As:
Show graph
Hide graph
Showing 55 reviews that match the filters above ( Very Positive )
There are no more reviews that match the filters set above
Adjust the filters above to see other reviews
Loading reviews...