Choose Project Zomboid
Choose Project Zomboid if you want a RPG game with Shared/Split Screen, Online PvP, and Shared/Split Screen Co-op. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 147,516 Steam reviews back the pick.
Project Zomboid vs MASS INVASION
Project Zomboid and MASS INVASION both land in Indie, Simulation, Early Access 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 Indie, Simulation, Early Access on Steam. Both support cooperative play. Project Zomboid is Deck Verified on Steam Deck; MASS INVASION has no Deck rating yet. 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 MASS INVASION
Choose MASS INVASION if you want an Action and Adventure experience.
Both Project Zomboid and MASS INVASION sit in Indie, Simulation, and Early Access on Steam and both list Multi-player, Online Co-op, and 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
 Project Zomboid |  MASS INVASION | |
|---|---|---|
| Released | 2013 | — |
| Genres | Indie, Simulation, RPG, Early Access | Action, Indie, Adventure, Simulation, Early Access |
| Platforms | Windows, macOS, Linux | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 19.99 USD | Price unknown |
| Steam reviews | 94% positive (147,516 reviews) | — |
| Multiplayer | Multi-player, Cross-Platform Multiplayer, Online Co-op | Multi-player, Online Co-op, Co-op |
| Developers | The Indie Stone | Going Gold Games |
Side by side
- Both share Indie, Simulation, Early Access on Steam.
- Both support cooperative play.
- Project Zomboid is Deck Verified on Steam Deck; MASS INVASION has no Deck rating yet.
Project Zomboid vs MASS INVASION — FAQ
- Are Project Zomboid and MASS INVASION similar?
- They overlap on Indie, Simulation, Early Access 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 Project Zomboid and MASS INVASION have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Project Zomboid ships Online Co-op, Shared/Split Screen Co-op; MASS INVASION ships Online Co-op, Co-op.
- Does Project Zomboid run on Steam Deck?
- Yes — Project Zomboid is rated Deck Verified by Valve. MASS INVASION doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.