Trade your wares and eliminate the competition in a cutthroat world. Buy new ships and stations to mine and haul resources. Explore the vast emptiness of space.
All Reviews:
Very Positive (61) - 95% of the 61 user reviews for this game are positive.
Release Date:
Aug 18, 2017

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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?

“We have been working on Helium Rain for more than three years, but there is always room to evolve. We already have some plans, and we'd like to know what our players want to see next.”

Approximately how long will this game be in Early Access?

“Helium Rain will stay in Early Access for around six months, depending on the volume of feedback we receive.”

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

“We want to add new content, keep polishing the game, and add new gameplay mechanisms if players request them. Specifically, we are planning on several important features.

  • Story
  • Fuel usage simulation
  • Engine ISP simulation
  • New navigation system
  • New areas to explore
  • New ships to fly
  • New tutorials

What is the current state of the Early Access version?

“The Early Access release features a fully-playable sandbox.

  • Spaceflight gameplay
  • 30 areas to explore
  • 12 flyable ships
  • Dynamic contract system
  • Technology system
  • Game tutorial
  • Joystick support in flight
  • Windows and Linux support

We have been play-testing it for months, and we believe it is already a quality product.”

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

“We will raise the price slightly when exiting Early Access.”

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

“We have been involving the community for quite some time, and will be happy to keep doing so.
  • We have a public bug & feature tracker at, where we've been tracking suggestions from players.
  • We will listen and respond directly to feedback on the Steam community forums and our dedicated subreddit.
  • The source code for the game is fully available on GitHub for the most dedicated players.
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Recent updates View all (15)

April 17

Eight months in Early Access

It's been eight months since Helium Rain released in Early Access ! We thought it was a good time to look back and see how it went, from our perspective, and to share our future plans for the game.

A wild ride
Helium Rain has seen thirteen updates in Early Access already. We spent the first weeks squashing bugs day and night, with 70 issues resolved during the first month. Overall, around 300 issues were entered on our issue tracker. We've managed to bring the number of known issues down to less than 10.

As a reminder, all of the source code for Helium Rain is publicly available on GitHub. This isn't very useful to most players, but we feel like it's important to have the source code available, both for curious developers and dedicated players. We also maintain a public bug tracker and roadmap so that players can follow progress on their issues or requested features.

Our initial Early Access roadmap announced a number of large features and we've been trying to live up to this promise.
  • We redesigned all stations in the game and added station complexes.
  • The separate Skirmish game mode launched early this year, along with upgraded combat.
  • The user interface was reworked to ensure a smoother experience and more data to players.
  • Linux is now a first-class citizen too, thanks to volunteer players who helped fix issues on their platform.

State of Deimos Games
We funded Deimos Games in the summmer of 2017, and we've completed accounting for our first business year. It's been a lot of work, both on technical development for the game, and on the legal & financial side of things. Under French law, company revenue is public data, and we're very committed to openness ourselves, so we decided to share our numbers with you. Here it goes !
  • Deimos Games will be reporting revenue of 14,000€ ($17,000). This isn't a very high number, but it's close to what we expected, and we're happy with this early result as a new company.
  • As you can probably calculate yourself, this amounts to around 2,000 copies sold.
  • We've achieved 96% positive reviews on Steam. This is heart-warming, and makes all our efforts worth it !
  • We're also happy to report that 14% of our lifetime sales happened on the Linux platform.
Game development is a very competitive field, with incredible games releasing every month. We're looking for happy players more than we are looking for huge sales numbers, so we're happy with the current state of things.

Update roadmap
Our current efforts are focused on a better economy model for the game. We'll show in more details what is coming to the game, but we can already show the upcoming the company log, which will make it much easier to fine-tune your company. Another new menu will provide yearly financial details to help you understand your company's budget. The irony of developing such tools while working on our own accounting isn't lost on us.

Once economy issues will be resolved, we will move on to another roadmap topic - new contracts, new story elements, new unique sectors to explore. You shouldn't expect a large scripted campaign here, but we'd love to bring a few unique missions, interesting areas and recurring content that helps with replayability. As usual, feel free to bring your ideas here !

The final topic on the roadmap is the fuel systems - an update dedicated to simulating fuel usage and engine efficiency. As of today, this is probably not going to be added to the game. We still feel like it would be a worthwile feature, but it raises a number of issues.
  • Fuel systems would be an interesting and realistic feature, but it's unclear how exactly they could mesh into the game without punishing players in some cases. We're aware production issues on some resources are already annoying, but at least they're not preventing gameplay. Losing access to fuel would terminate your game, something we don't consider acceptable. Workarounds for such a core issue are problematic.
  • The game is already very complex, including on our side as developers. We created a bit of a monster with Helium Rain: the game's depth is enjoyable, but it makes it very hard for us to create new systems or maintain existing ones. It also makes it harder for players to get into the game.
  • Finally, we have now spent close to four years in development on this project, so the scope of new developments is starting to get under scrutiny.
Simply put, we should have considered this feature much earlier in the game, and it wouldn't do it any good now.

We plan on exiting Early Access and releasing as a final product at the end of this summer. We don't have a specific date yet - we will release the game when we are confident it lives up to our expectations and works without bugs. In the meantime, we're very open to new ideas, if they're small in scope, relevant to the gameplay and popular in the community.

Thank you for supporting this project, and have fun with the game !
13 comments Read more

March 25

Farm update

The Farm update has been published for Helium Rain, including a new sector, graphics upgrades and many fixed issues !

New sector : the Farm

We've added a new playable sector around Nema, one that specializes in food production. The Farm features gravity rings with rotating sections for growing food in sunlight.

Graphics upgrades

While graphics are secondary to the current work on the economy and gameplay features, it's still important to keep the game looking good. The lighting has been improved, featuring back-lighting from planets to have smoother ambient lighting ; and the rings of Nema now have a much cleaner terminator.

Some other graphical tweaks include nicer hulls, some updated HUD icons, etc.

Technical changes

We're still on bug-hunting duty. No less than 11 bugs have been fixed in this version - all major bugs we were aware of have been fixed. We're still looking for information on some random crashes, but this update will also make it easier for us to track it down.
    Fix crash on travel
  • Fix notification freeze at the end of a travel
  • Fix some skirmishes not counted as a win despite victory
  • Fix incorrect additional binding for thrust input
  • Fix AI stations upgrading stations beyond max level
  • Fix company logo covering some contract descriptions
  • Fix useless cargo bays in complexes
  • Fix cargo bay lock system
  • Fix complex's shipyard not always starting production
  • Fix random crash on opening the sector menu
  • Fix some cases of scrapping not going back from the menu
We're also bringing an updated Unreal Engine version that was tested on the beta channel for a month. This version should, among minor changes, fix some occurences of random game crashes. As usual, you can find the full changelog at Gamepedia.

What's next ?

Our next update will bring new economy features, including a company log with all your company's transactions. We'll also work on addressing end-game issues, and possibly performance issues on day simulation.

Have fun, and keep the feedback coming so that we can make Helium Rain ever better !
3 comments Read more
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About This Game

Build your fleet, trade, explore and conquer

Helium Rain is a single-player space simulation that places you at the helm of a spacefaring company. Trade resources, buy ships and stations to fulfill contracts ! Dock at stations to buy and sell you wares or upgrade your ship, upgrade your technology to be more efficient and militarize your fleet to prevent piracy.

You will need to master both real-time action and long-term strategy: destroying a freighter has a direct impact on the economy, while declaring war will make your spaceflight environment slightly more hostile...

  • 12 playable ships with weapon and engine upgrades
    Build and fly fleets of fighters, bombers, cargos, corvettes or capital ships. Buy new engines and weapons.
  • Fast-paced combat with Newtonian flight, localized damage and joystick support
    There is no speed limit in Helium Rain. You can fly at half a mile a second while aiming backwards. Aim for critical systems in order to disable ships, kill their crew or capture targets, and don't fly into asteroids.
  • Realistic economy model
    Take advantage of an accurate simulation of space trade to be the most competitive company. If diplomacy fails, blockades are in order.
  • A planetary system to explore
    Explore around 25 sectors orbiting the gas giant Nema and its moons.
  • Procedural contracts, world exploration, technology upgrades
    Pick contracts and build your empire to become the largest company.
  • Quick-action skirmish mode
    Setup your fleet, pick an opponent and go into fighting action right away !

A world that feels real

Your ships have generators, radiators, weapons, engines, cargo bays or life support systems - they all work together. Every thruster on your ship plays a role. Aim for engines to pin down your enemies, or send them spinning around by destroying power stations. Most ships have more than thirty individual parts ! You can customize the most important parts of your ships - your main engines, attitude control thrusters, weapons and hull colors.

Your competitors are independent factions, companies with the same goal as yours - ruling the system. They will try to undercut you, or even attack you if you become a threat to them. But don't be too quick to destroy them, as war can break the supply of resources you depend on ! Attacking freighters will destroy resources, making them costlier, with the potential to cause an economic crisis.

System Requirements

SteamOS + Linux
    • Requires a 64-bit processor and operating system
    • OS: Windows 7 (64 bits)
    • Processor: Intel Core® i3
    • Memory: 4000 MB RAM
    • Graphics: NVIDIA GeForce® GTX 470 / AMD Radeon® HD 6870 / DX10 compatible GPU with at least 1GB VRAM
    • DirectX: Version 10
    • Storage: 5000 MB available space
    • Additional Notes: Only 64 bits versions of Windows are supported.
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 (64 bits)
    • Processor: Intel Core® i7
    • Memory: 8000 MB RAM
    • Graphics: NVIDIA GeForce® GTX 970
    • DirectX: Version 11
    • Storage: 5000 MB available space
    • Additional Notes: Only 64 bits versions of Windows are supported.
    • Requires a 64-bit processor and operating system
    • OS: Ubuntu 16.04
    • Processor: Intel Core® i3
    • Memory: 4000 MB RAM
    • Graphics: NVIDIA GeForce® GTX 470 / DX10 compatible GPU with at least 1GB VRAM
    • Storage: 5000 MB available space
    • Additional Notes: Only 64 bits versions of Linux are supported. Check the Linux support thread in the forums !
    • Requires a 64-bit processor and operating system
    • OS: Ubuntu 17.10
    • Processor: Intel Core® i7
    • Memory: 8000 MB RAM
    • Graphics: NVIDIA GeForce® GTX 970
    • Storage: 5000 MB available space
    • Additional Notes: Only 64 bits versions of Linux are supported. Check the Linux support thread in the forums !
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