Choose Iron Marines
Choose Iron Marines if you want an Indie and Casual experience. Iron Marines launched in 2019.
Iron Marines vs Sphere Invasion
Iron Marines and Sphere Invasion both land in Action, 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 share Action, Strategy on Steam. Iron Marines (2019) is 1 year older than Sphere Invasion (2020). Sphere Invasion is currently ~20% cheaper on Steam than Iron Marines (5.99 USD vs. 7.49 USD). 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 Sphere Invasion
Choose Sphere Invasion if it's currently about 20% cheaper on the Steam Store. Sphere Invasion launched in 2020.
Both Iron Marines and Sphere Invasion sit in Action and 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
 Iron Marines |  Sphere Invasion | |
|---|---|---|
| Released | 2019 | 2020 |
| Genres | Action, Strategy, Indie, Casual | Action, Strategy |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 7.49 USD | 5.99 USD |
| Steam reviews | 76.5% positive (506 reviews) | 1 reviews |
| Multiplayer | Single-player only | Single-player only |
| Developers | Ironhide Game Studio | Space and Frogs |
Side by side
- Both share Action, Strategy on Steam.
- Iron Marines (2019) is 1 year older than Sphere Invasion (2020).
- Sphere Invasion is currently ~20% cheaper on Steam than Iron Marines (5.99 USD vs. 7.49 USD).
- Iron Marines is Deck Playable on Steam Deck; Sphere Invasion has no Deck rating yet.
Iron Marines vs Sphere Invasion — FAQ
- Should I play Iron Marines or Sphere Invasion first?
- If you want chronology, Iron Marines (2019) came out before Sphere Invasion (2020). 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 Iron Marines and Sphere Invasion similar?
- They overlap on Action, 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 Iron Marines run on Steam Deck?
- Yes — Iron Marines is rated Deck Playable by Valve. Sphere Invasion doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.