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Announced at GDC 2011, Rebellion is the third expansion to Sins of a Solar Empire (Franchise) franchise following Entrenchment and Diplomacy. It is the series' first stand-alone expansion, meaning it does not require the base game to function.
Rebellion adds new "loyalist" and "rebel" sub-factions to the game. These sub-factions gain exclusive access to new technologies and ship variants. Additions also include new victory conditions, capital ships for each faction, maneuverable corvette-class ships, and titan-class ships which can single-handedly wipe out entire armies. On a more technical level, the expansion improves lighting and particle effects, artificial intelligence, CPU usage, modding support and adds Impulse::Reactor support for improved connectivity with Stardock's Impulse platform.
The Forbidden Worlds DLC pack introduced four new planet types to colonize, a new planet specialization system, 15 new research subjects and 40 new planet bonuses.
| Minimum | Recommended |
|---|---|
| OS: Windows 7 / Vista SP2 / XP SP3 | OS: Windows 7 |
| Processor: Intel Pentium 4 3GHz Processor or Equivalent | Processor: Intel Core i5 or Equivalent Processor |
| Memory: 2 GB RAM | Memory: 4 GB RAM |
| Graphics: 256 MB DirectX 9.0c Compatible Video Card w/Pixel Shader 3.0 Support | Graphics: 1 GB DirectX 9.0c Compatible Video Card w/Pixel Shader 3.0 Support |
| DirectX: 9.0c | DirectX: 9.0c |
| Hard Drive: 5 GB HD space | Hard Drive: 5 GB HD space |
| Sound: DirectX 9.0c Compatible Sound Card | Sound: DirectX 9.0c Compatible Sound Card |