Compare Solar Flux prices across trusted key stores and find the best deal. Developed by Firebrand Games. Published by Firebrand Games. Released on 10/24/2013. Available on PC. Genres: Indie, Strategy. Metacritic score: 72/100.

A physics-based puzzle game where you pilot a ship to collect plasma and feed dying suns. Deceptively simple, surprisingly punishing.

Solar Flux is a space puzzle game from Firebrand Games that puts you in control of a small omni-directional ship with one core job: collect plasma fragments drifting through space and deliver them to dying suns before everything goes dark. That premise sounds straightforward, but the execution leans hard on orbital mechanics and momentum management. There are no thrusters you can hold down indefinitely. Every nudge counts, every gravity well pulls, and a poorly-timed boost will send your plasma cargo spiraling into a star before you wanted it to. The puzzle structure is the kind that respects physics more than it respects your impatience. The game is organized into a series of increasingly complex solar systems, each one a self-contained puzzle with its own layout of suns, hazards, and plasma deposits. Early levels teach you the basics of gravitational slingshots and heat management - your ship has a heat meter, and flying too close to a sun too long will destroy you. Later levels stack multiple objectives and tighter margins, demanding that you think several moves ahead rather than reacting in the moment. For a strategy-minded player, that planning layer is where the game earns its genre tag. You are essentially solving a routing problem with physics as the enforcement mechanism. Where Solar Flux falls short is in feedback and pacing. The game does not do a thorough job of explaining why a particular approach failed, which makes some early deaths feel arbitrary rather than instructive. The visual design is clean but sparse, and after a few solar systems the environments start to blur together. There is no meaningful upgrade system or build variety - what you see at the start is what you work with throughout. For a strategy player who lives for incremental optimization across dozens of variables, that flatness becomes noticeable around the midpoint. The mixed Steam review score (74 percent positive across around 300 reviews) reflects a game that players either click with immediately or bounce off without a clear sense of why. That said, the core loop is genuinely satisfying when it works. Nailing a three-plasma delivery run by chaining gravity assists without overheating is the kind of quiet victory that puzzle fans specifically seek out. Sessions are short and self-contained, which makes it a reasonable pick for anyone who wants something that demands focus in small bursts rather than long campaigns. It is not a deep strategy title in the Paradox sense - there are no tech trees, no diplomacy, no late-game power curves to plan toward. Think of it as a spatial reasoning exercise wrapped in a space aesthetic, and you will calibrate your expectations correctly. If you are a dedicated puzzle solver who enjoys physics-driven challenges and can tolerate a tutorial that trusts you perhaps a bit too much, Solar Flux has enough content to keep you occupied across its full run. Strategy purists hunting for systemic depth will hit a ceiling fairly quickly. It is a competent, occasionally elegant puzzle game that arrived in a crowded market and never quite differentiated itself enough to break through - which is a shame, because the orbital mechanics at its center are more interesting than the packaging suggests. Diego, Scout Team

Solar Flux

Solar Flux

Oct 24, 2013Firebrand Games
GamerScout Says

A physics-based puzzle game where you pilot a ship to collect plasma and feed dying suns. Deceptively simple, surprisingly punishing.

PC
Best Price Available
€1.18
at Kinguin
Lowest tracked: €1.18
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GamerScout Verdict

Best for puzzle fans who enjoy spatial reasoning and physics challenges - strategy depth-seekers will find it too shallow too fast.

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KinguinBest price
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€1.18
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€1.39
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StandardGlobalSteam KeyKey
€1.52-84%
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StandardGlobalSteam KeyKey
€2.04-18%
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StandardEurope (EU)Steam KeyKey
€3.37-65%
Priced in EUR by the store
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StandardEurope (EU)Steam KeyKey
€9.75
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Price History

Lowest tracked
€1.1831 Aug 2026
Current best
€1.18
Lowest since we started tracking
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€1.10€1.16€1.23€1.295 Jun29 Jun22 Jul15 Aug7 Sept
5 Jun — 7 Sept
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Screenshots & Media

About Solar Flux

Solar Flux is a space puzzle game from Firebrand Games that puts you in control of a small omni-directional ship with one core job: collect plasma fragments drifting through space and deliver them to dying suns before everything goes dark. That premise sounds straightforward, but the execution leans hard on orbital mechanics and momentum management. There are no thrusters you can hold down indefinitely. Every nudge counts, every gravity well pulls, and a poorly-timed boost will send your plasma cargo spiraling into a star before you wanted it to. The puzzle structure is the kind that respects physics more than it respects your impatience. The game is organized into a series of increasingly complex solar systems, each one a self-contained puzzle with its own layout of suns, hazards, and plasma deposits. Early levels teach you the basics of gravitational slingshots and heat management - your ship has a heat meter, and flying too close to a sun too long will destroy you. Later levels stack multiple objectives and tighter margins, demanding that you think several moves ahead rather than reacting in the moment. For a strategy-minded player, that planning layer is where the game earns its genre tag. You are essentially solving a routing problem with physics as the enforcement mechanism. Where Solar Flux falls short is in feedback and pacing. The game does not do a thorough job of explaining why a particular approach failed, which makes some early deaths feel arbitrary rather than instructive. The visual design is clean but sparse, and after a few solar systems the environments start to blur together. There is no meaningful upgrade system or build variety - what you see at the start is what you work with throughout. For a strategy player who lives for incremental optimization across dozens of variables, that flatness becomes noticeable around the midpoint. The mixed Steam review score (74 percent positive across around 300 reviews) reflects a game that players either click with immediately or bounce off without a clear sense of why. That said, the core loop is genuinely satisfying when it works. Nailing a three-plasma delivery run by chaining gravity assists without overheating is the kind of quiet victory that puzzle fans specifically seek out. Sessions are short and self-contained, which makes it a reasonable pick for anyone who wants something that demands focus in small bursts rather than long campaigns. It is not a deep strategy title in the Paradox sense - there are no tech trees, no diplomacy, no late-game power curves to plan toward. Think of it as a spatial reasoning exercise wrapped in a space aesthetic, and you will calibrate your expectations correctly. If you are a dedicated puzzle solver who enjoys physics-driven challenges and can tolerate a tutorial that trusts you perhaps a bit too much, Solar Flux has enough content to keep you occupied across its full run. Strategy purists hunting for systemic depth will hit a ceiling fairly quickly. It is a competent, occasionally elegant puzzle game that arrived in a crowded market and never quite differentiated itself enough to break through - which is a shame, because the orbital mechanics at its center are more interesting than the packaging suggests.

Diego
Diego · Scout Team

Strategy & simulation

Tags

steamPhysics PuzzlerOrbital MechanicsSpace PuzzleSingle SessionMinimalistPrecision MovementScore Attack

System Requirements

Minimum

Processor
AMD Turion X2/Intel Core 2 Duo
Memory
2 GB RAM
Graphics
Nvidia 8000 series or better
DirectX
Version 9.0c
Storage
300 MB available space

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Reviews & Ratings

Metacritic
72
Steam
74%(309)

Game Info

Developer
Firebrand Games
Publisher
Firebrand Games
Release Date
Oct 24, 2013

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Frequently asked questions about Solar Flux

How much does Solar Flux cost?

As of 7 September 2026, the cheapest in-stock offer for Solar Flux is €1.18 at Kinguin, out of 6 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy Solar Flux cheapest?

The lowest in-stock price we track for Solar Flux is €1.18 at Kinguin (7 September 2026). We compare 6 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is Solar Flux available on?

Solar Flux is available on PC.

When was Solar Flux released?

Solar Flux was released on 24 October 2013.

Who developed Solar Flux?

Solar Flux was developed by Firebrand Games.

Is Solar Flux worth buying?

Solar Flux holds a Metacritic score of 72/100, making it one of the standout Indie titles. See the full reviews, ratings and how-long-to-beat times on this page to decide.