Choose Firmament Wars
Choose Firmament Wars if you want an Indie experience. On Steam, it's currently about 70% cheaper on the Steam Store. Firmament Wars launched in 2018.
Firmament Wars vs Sins of a Solar Empire II
Firmament Wars and Sins of a Solar Empire II both land in Strategy on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both are Strategy games on Steam. Firmament Wars (2018) is 6 years older than Sins of a Solar Empire II (2024). Sins of a Solar Empire II scores higher on Steam reviews (83.7% positive) than Firmament Wars (63.2% positive). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Which should you pick?
Choose Sins of a Solar Empire II
Choose Sins of a Solar Empire II if you want a Simulation game with LAN PvP, LAN Co-op, and Color Alternatives. On Steam, it's the newer release (2024) and ships with the modern feature baseline. 4,857 Steam reviews back the pick.
Both Firmament Wars and Sins of a Solar Empire II sit in Strategy on Steam and both list Multi-player, Online PvP, and Online Co-op, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.
Side-by-side comparison
 Firmament Wars |  Sins of a Solar Empire II | |
|---|---|---|
| Released | 2018 | 2024 |
| Genres | Strategy, Indie | Strategy, Simulation |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Deck Playable |
| Price | 14.99 USD | 49.99 USD |
| Steam reviews | 63.2% positive (19 reviews) | 83.7% positive (4,857 reviews) |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player, Cross-Platform Multiplayer, Online Co-op |
| Developers | Neverworks Games | Ironclad Games Corporation, Stardock Entertainment |
Side by side
- Both are Strategy games on Steam.
- Firmament Wars (2018) is 6 years older than Sins of a Solar Empire II (2024).
- Sins of a Solar Empire II scores higher on Steam reviews (83.7% positive) than Firmament Wars (63.2% positive).
- Firmament Wars is currently ~70% cheaper on Steam than Sins of a Solar Empire II (14.99 USD vs. 49.99 USD).
- Both support cooperative play.
- Sins of a Solar Empire II is Deck Playable on Steam Deck; Firmament Wars has no Deck rating yet.
Firmament Wars vs Sins of a Solar Empire II — FAQ
- Should I play Firmament Wars or Sins of a Solar Empire II first?
- If you want chronology, Firmament Wars (2018) came out before Sins of a Solar Empire II (2024). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are Firmament Wars and Sins of a Solar Empire II similar?
- They overlap on Strategy on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
- Do both Firmament Wars and Sins of a Solar Empire II have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Firmament Wars ships Online Co-op, Co-op; Sins of a Solar Empire II ships Online Co-op, LAN Co-op.