Choose Atom Zombie Smasher
Choose Atom Zombie Smasher if you want a Strategy experience. Atom Zombie Smasher launched in 2011.
Atom Zombie Smasher vs Only Out
Atom Zombie Smasher and Only Out both land in 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 are Indie games on Steam. Atom Zombie Smasher (2011) is 14 years older than Only Out (2025). Only Out is currently ~50% cheaper on Steam than Atom Zombie Smasher (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 Only Out
Choose Only Out if you want the Steam Leaderboards side of the pairing. On Steam, it's currently about 50% cheaper on the Steam Store. Only Out launched in 2025.
Both Atom Zombie Smasher and Only Out sit in Indie on Steam and both list Multi-player, Shared/Split Screen, and Shared/Split Screen 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
 Atom Zombie Smasher |  Only Out | |
|---|---|---|
| Released | 2011 | 2025 |
| Genres | Strategy, Indie | Indie |
| Platforms | Windows, macOS, Linux | Windows, macOS |
| Steam Deck | Unrated | Unrated |
| Price | 9.99 USD | 4.99 USD |
| Steam reviews | 90.3% positive (927 reviews) | — |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Multi-player, Shared/Split Screen Co-op, Co-op |
| Developers | Blendo Games | Shark Studio |
Side by side
- Both are Indie games on Steam.
- Atom Zombie Smasher (2011) is 14 years older than Only Out (2025).
- Only Out is currently ~50% cheaper on Steam than Atom Zombie Smasher (4.99 USD vs. 9.99 USD).
- Both support cooperative play.
Atom Zombie Smasher vs Only Out — FAQ
- Should I play Atom Zombie Smasher or Only Out first?
- If you want chronology, Atom Zombie Smasher (2011) came out before Only Out (2025). 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 Atom Zombie Smasher and Only Out similar?
- They overlap on 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 Atom Zombie Smasher and Only Out have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Atom Zombie Smasher ships Shared/Split Screen Co-op, Co-op; Only Out ships Shared/Split Screen Co-op, Co-op.