Choose Sigma Impact
Choose Sigma Impact if it's currently about 50% cheaper on the Steam Store. Sigma Impact launched in 2021.
Sigma Impact vs Rocket!
Sigma Impact and Rocket! both land in Action, Indie 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, Indie on Steam. Sigma Impact (2021) is 3 years older than Rocket! (2024). Sigma Impact is currently ~50% cheaper on Steam than Rocket! (4.99 USD vs. 9.99 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 Rocket!
Choose Rocket! if you want a Strategy game with Online PvP and Online Co-op. On Steam, it's the newer release (2024) and ships with the modern feature baseline. Rocket! launched in 2024.
Both Sigma Impact and Rocket! sit in Action and Indie on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen PvP, 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
 Sigma Impact |  Rocket! | |
|---|---|---|
| Released | 2021 | 2024 |
| Genres | Action, Indie | Action, Strategy, Indie |
| Platforms | Windows | Windows, macOS, Linux |
| Steam Deck | Deck Verified | Unrated |
| Price | 4.99 USD | 9.99 USD |
| Steam reviews | 96.3% positive (82 reviews) | 8 reviews |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Online Co-op, Shared/Split Screen Co-op |
| Developers | John Bishop | ZeNfA Productions |
Side by side
- Both share Action, Indie on Steam.
- Sigma Impact (2021) is 3 years older than Rocket! (2024).
- Sigma Impact is currently ~50% cheaper on Steam than Rocket! (4.99 USD vs. 9.99 USD).
- Both support cooperative play.
- Sigma Impact is Deck Verified on Steam Deck; Rocket! has no Deck rating yet.
Sigma Impact vs Rocket! — FAQ
- Should I play Sigma Impact or Rocket! first?
- If you want chronology, Sigma Impact (2021) came out before Rocket! (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 Sigma Impact and Rocket! similar?
- They overlap on Action, Indie 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 Sigma Impact and Rocket! have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Sigma Impact ships Shared/Split Screen Co-op, Co-op; Rocket! ships Online Co-op, Shared/Split Screen Co-op.
- Does Sigma Impact run on Steam Deck?
- Yes — Sigma Impact is rated Deck Verified by Valve. Rocket! doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.