Choose Galactic Civilizations III
Choose Galactic Civilizations III if you want the Multi-player, Online PvP, and Online Co-op side of the pairing. On Steam, it has co-op, so you can bring a friend. 6,580 Steam reviews back the pick.
Galactic Civilizations III vs Astro Protocol
Galactic Civilizations III and Astro Protocol 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. Galactic Civilizations III (2015) is 11 years older than Astro Protocol (2026). Astro Protocol scores higher on Steam reviews (95.2% positive) than Galactic Civilizations III (77.9% 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 Astro Protocol
Choose Astro Protocol if you want the Adjustable Text Size, Custom Volume Controls, and Stereo Sound side of the pairing. On Steam, it's currently about 72% cheaper on the Steam Store. Astro Protocol launched in 2026.
Both Galactic Civilizations III and Astro Protocol sit in Strategy on Steam, 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
 Galactic Civilizations III |  Astro Protocol | |
|---|---|---|
| Released | 2015 | 2026 |
| Genres | Strategy | Strategy |
| Platforms | Windows | Windows, macOS, Linux |
| Steam Deck | Deck Playable | Deck Playable |
| Price | 29.99 USD | 8.39 USD |
| Steam reviews | 77.9% positive (6,580 reviews) | 95.2% positive (42 reviews) |
| Multiplayer | Multi-player, Online Co-op, Co-op | Single-player only |
| Developers | Stardock Entertainment | Null Vector Studios |
Side by side
- Both are Strategy games on Steam.
- Galactic Civilizations III (2015) is 11 years older than Astro Protocol (2026).
- Astro Protocol scores higher on Steam reviews (95.2% positive) than Galactic Civilizations III (77.9% positive).
- Astro Protocol is currently ~72% cheaper on Steam than Galactic Civilizations III (8.39 USD vs. 29.99 USD).
- Galactic Civilizations III has co-op; Astro Protocol does not.
- Both are Deck Playable.
Galactic Civilizations III vs Astro Protocol — FAQ
- Should I play Galactic Civilizations III or Astro Protocol first?
- If you want chronology, Galactic Civilizations III (2015) came out before Astro Protocol (2026). 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 Galactic Civilizations III and Astro Protocol 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.
- Does Astro Protocol have multiplayer like Galactic Civilizations III?
- No. Galactic Civilizations III supports multiplayer on Steam (Multi-player, Online Co-op, Co-op), while Astro Protocol is listed as single-player only.