Choose AI War 2
Choose AI War 2 if you want an Indie and Simulation game with Multi-player, Online Co-op, and LAN Co-op. On Steam, it has co-op, so you can bring a friend. AI War 2 launched in 2019.
AI War 2 vs Sphere Invasion
AI War 2 and Sphere Invasion 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. AI War 2 (2019) is 1 year older than Sphere Invasion (2020). Sphere Invasion is currently ~70% cheaper on Steam than AI War 2 (5.99 USD vs. 19.99 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 you want an Action experience. On Steam, it's currently about 70% cheaper on the Steam Store. Sphere Invasion launched in 2020.
Both AI War 2 and Sphere Invasion 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
 AI War 2 |  Sphere Invasion | |
|---|---|---|
| Released | 2019 | 2020 |
| Genres | Strategy, Indie, Simulation | Action, Strategy |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Playable | Unrated |
| Price | 19.99 USD | 5.99 USD |
| Steam reviews | 89.2% positive (950 reviews) | 1 reviews |
| Multiplayer | Multi-player, Cross-Platform Multiplayer, Online Co-op | Single-player only |
| Developers | Arcen Games | Space and Frogs |
Side by side
- Both are Strategy games on Steam.
- AI War 2 (2019) is 1 year older than Sphere Invasion (2020).
- Sphere Invasion is currently ~70% cheaper on Steam than AI War 2 (5.99 USD vs. 19.99 USD).
- AI War 2 has co-op; Sphere Invasion does not.
- AI War 2 is Deck Playable on Steam Deck; Sphere Invasion has no Deck rating yet.
AI War 2 vs Sphere Invasion — FAQ
- Should I play AI War 2 or Sphere Invasion first?
- If you want chronology, AI War 2 (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 AI War 2 and Sphere Invasion 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 Sphere Invasion have multiplayer like AI War 2?
- No. AI War 2 supports multiplayer on Steam (Multi-player, Cross-Platform Multiplayer, Online Co-op), while Sphere Invasion is listed as single-player only.
- Does AI War 2 run on Steam Deck?
- Yes — AI War 2 is rated Deck Playable by Valve. Sphere Invasion doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.