A realistic space opera for PC.

Explore the vast emptiness of space. Take command of your ships, create your empire.
Helium Rain is a realistic space simulation game.

  • Fly any ship of your fleet, including fighters, freighters or capital ships.
  • Do as you please, whether you want to become a wealthy merchant or a fierce pilot.
  • Customize your ship, change your equipment, buy new gear.

Hard Sci-fi

We want to build 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 of our ships have more than thirty individual parts !

One planet, many enemies

The massive gas giant Nema is your new home. The planet is a near-infinite source of fuel, her orbits a swarm of asteroids, her irradiated moons a silent threat. Helium Rain gives you an empire to build, but you will need to claim it for yourself, and defend it against your competitors. It's up to you to decide if you will trade resources, start wars, or just avoid trouble.


You can customize the most important parts of your ships - your main engines, attitude control thrusters and weapons. You can choose your colors, and of course, you can fly every ship in the game.

PC graphics

Helium Rain is built with Unreal Engine 4 and targets the most powerful gaming rigs. The game will ship with support for 4K rendering, supersampling, high-quality shading and post-processing effects.

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We've been talking about releasing Helium Rain since 2015. No more talk : next month, on August 18, Helium Rain will be released on Steam as an Early Access game. Our realistic space sim will be available for Windows and Linux PC, with no DRM. Watch our trailer below !

On the choice of Early Access

Games in Early Access are a mixed bag. Some games stay in development for years with dozens of updates, some see a few updates and a large price hike when the game is released a few months later. We know that some people have little trust in Early Access titles, so we thought it would be a good idea to explain what we're doing.

We have already been asking for feedback and acting on it in our private beta, where players would suggest improvements. On this next menu, the orbital map, a number of items were suggested by players.

Helium Rain has been in development for more than three years and is an always-evolving project. If we waited for the game to be finished, we probably would release it in yet another year, adding features and content to a game no one is playing. We believe we are at a point where the game is already really cool ; and for some time now, the reason we didn't release it was that there were still ideas that we wanted to put into it. H ere is a comparison of the state of the game in 2016 (left) and today (right) - the content existed, but it wasn't good enough for release.

New features

Our last feature on IndieDB was about the content we were working on, and what was left to do. The contract system, new content and features are now all done, but we've also been adding lots of interesting features that we didn't plan for :

  • Meteorite intercept contracts
  • Missiles
  • Joystick support
  • New places to explore
  • New ships
  • Better menus

We want to keep doing this in Early Access, adding new gameplay features when we want to try something new.

Help us make it better !

We want to see what gamers think of our project, hear what they have to say and how we can improve upon it. Here are some of the future elements we'd like to decide with the community.

  • Engines that impact the travel time, making upgrades more strategically valuable.
  • A fuel usage system, requiring players to refill their ships periodcally, just like they do for ammunition now. Flying in a conservative way would be more useful.
  • We're going to be working on a story quest chain.

Any feature that you have in mind is worth talking about ! We're open to every idea you might have. This isn't the end of development for us - it is a turning point.

Thank you for helping and supporting us for all these years !

Helium Rain - March 2017

Helium Rain - March 2017


New quest system, weapon, stations, ship, and Unreal Engine version - Helium Rain is nearing completion !

Help us design our next ship !

Help us design our next ship !

News 2 comments

Our largest ship yet is being designed, and we want your input. Which model would you like us to create ?

Helium Rain combat gameplay

Helium Rain combat gameplay


Helium Rain's combat system is now finished ! We're moving on to implementing quests, exploration, and technology progress.

Turning the ship around : open-source & long-term gameplay

Turning the ship around : open-source & long-term gameplay

News 4 comments

It's been four months since Helium Rain launched a private Alpha version. Testers had issues with it, so instead of moving forward with a public release...


Looks cool, and there are some interesting ship designs too. I'll definitely be keeping track of this.

Reply Good karma Bad karma+3 votes

will this be online?

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VoidStranger Creator

No, this is a 100% single-player game.

Reply Good karma+4 votes

Excellent news, of being Singleplayer!!

Reply Good karma Bad karma+2 votes

That sounds good to me. I'm a little frustrated and tired of when searching for games, something around 70-80% of what I'd otherwise be tempted to look at are MMO-somethings....

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Helium Rain
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Deimos Games
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Latest tweets from @heliumrain

Some nice new HUD work on #HeliumRain for #screenshotsaturday ! A month left until #steam release ! #indiegame with… T.co

Jul 22 2017

Helium Rain will be available in Early Access on @steam_games on August 18 ! Store.steampowered.com with @UnrealEngine #indiegame

Jul 21 2017

Finishing enemies with missile in #HeliumRain - #indiegame with @UnrealEngine T.co

Jul 16 2017

Capital ship engagement in #HeliumRain ! #indiegame with @UnrealEngine, soon on #steam ! T.co

Jul 16 2017

Helium Rain launches on August 18, watch our trailer ! #indiegame #linuxgaming with @UnrealEngine Youtube.com

Jul 15 2017

Adena is the most peaceful of Nema's moons - upgraded with better coloring before Early Access :) #indiegameT.co

Jul 15 2017

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