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Sins of a Solar Empire®: Rebellion
Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-08-31 · quoted reviews as of 2026-05-12.
What reviewers agree on
61 of the 102 reviews raise this.
“Genuinely one of the best RTS I've ever played, It blends real time strategy into 4x beautifully. There's a certain charm permeating the entire game, whether it's because it's older, or an indie title, or both, I don't…”
“Been Playing this title for years and years.... So many variations, so many different ways to win the game. Very fun for a RTS, highly recommend”
15 of the 102 reviews raise this.
“runs well and the base game is great the modding community makes it even better”
“For a game now old and overshadowed by its predeccesor, it still shines and is massively enjoyable - especially in light of mods like Star Wars Interregnum. What an amazing community.”
“One of the better RTS games. There are lots of mods that make it even better.”
10 of the 102 reviews raise this.
“Been Playing this title for years and years.... So many variations, so many different ways to win the game. Very fun for a RTS, highly recommend”
“Absolutely recommended. *Sins of a Solar Empire: Rebellion* is one of those rare strategy games that still holds up after hundreds—or thousands—of hours. It blends 4X empire-building with real-time fleet combat in a way…”
“After the initial learning curve this game from 2008 is a pure gem. The 3 races feel truely unique, yet also quite balanced. If you're looking for a cool space RTS with quite alot of depth and replayability this is a…”
5 of the 102 reviews raise this.
“I enjoy the flexibility this game provides. I can become familiar with 1 method of play or many. the difficulty has been clearly balanced. I often play long stretches of hard/epic. Yet the building of your forces and…”
“After the initial learning curve this game from 2008 is a pure gem. The 3 races feel truely unique, yet also quite balanced. If you're looking for a cool space RTS with quite alot of depth and replayability this is a…”
“This game is as fun and as challenging as it was in 2012. Definitely worth the price. Good luck beating the computer on difficulty 3 or higher.”
4 of the 102 reviews raise this.
“good game well balanced runs well and is not a one sided mess like the sequel”
“runs well and the base game is great the modding community makes it even better”
“---{ Graphics }--- ☐ You forget what reality is ☐ Beautiful ☑ Good ☐ Decent ☐ Bad ☐ Don‘t look too long at it ---{ Gameplay }--- ☐ Very good ☑ Good ☐ It's just gameplay ☐ Mehh ☐ Watch paint dry instead ☐ Just don't ---{…”
4 of the 102 reviews raise this · 3 of them still recommend the game.
“Still slow and cumbersome, but increased variety makes it more interesting than Trinity. A bummer it doesn't have any campaign but its worthy for zoning out.”
4 of the 102 reviews raise this · 3 of them still recommend the game.
“still some crashes and dialogue boxes opening up to-date.”
Counted across 102 English reviews, sampled to match this game's 93.2% positive rating · as of 2026-05-12
“One of my favorites. Don't forget to scale the U.I. up in the settings menu, at the bottom of the page.”
— a player, Steam review · 18 hrs played“An outstanding game which is eclipsed in every meaningful way by its sequel, Sins1 / Rebellion still has a few major things going for it. The mods. While ST Armada 4 will (or has, depending on when / if you read this) come out, ST Armada 3 rocks. Ages of the Federation is even…”
— a player, Steam review · 99 hrs played“Enjoyable RTS, pretty straightforward gameplay, I comeback and play a hundred hours throughout the year.”
— a player, Steam review · 1,576 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-05.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-10). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Publisher Sale: Up to 70% off Sins of a Solar Empire titles
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-12.
| Genres | Action, Indie, Simulation, Strategy |
| Player tags | Management · Diplomacy · Online Co-Op · Multiplayer · Singleplayer · Simulation · Space · Strategy · 4X · RTS · Grand Strategy · Sandbox (SteamSpy community voting) |
| Features | Single-player · Multi-player · PvP · Online PvP · LAN PvP · Co-op · Online Co-op · LAN Co-op |
| Languages | English * , Japanese, Simplified Chinese, French * , Italian * , German * , Polish, Russian * |
| Achievements | 68 |
| Official site | https://www.sinsofasolarempire.com |
Minimum system requirements (PC)
Minimum: OS *: Windows 10 / 8 / Windows 7 SP1 Processor: 3 GHz Intel Pentium 4 Processor or Equivalent Memory: 2 GB Available System Memory Graphics: 256 MB Video Card w/Pixel Shader 3.0 Support (Radeon X1650 / GeForce 6800* or Better) DirectX®: 9.0c Hard Drive: 5 GB HD space Sound: DirectX 9.0c Compatible Sound Card Other Requirements: Keyboard and Mouse (w/scroll wheel), Broadband Internet connection for Multiplayer * NVidia video chipsets must use driver version 296.10 or higher and mobile cards be set as the primary video chipset for the game.