Choose Online: 404
Choose Online: 404 if you want an Adventure and Massively Multiplayer game with Adjustable Difficulty and Save Anytime. Online: 404 launched in 2026.
Online: 404 vs Zombie Defense:Breach of The Undead
Online: 404 and Zombie Defense:Breach of The Undead both land in Action, Indie, Simulation 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, Simulation on Steam. Both support cooperative play. 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 Zombie Defense:Breach of The Undead
Choose Zombie Defense:Breach of The Undead if you want a Casual experience.
Both Online: 404 and Zombie Defense:Breach of The Undead sit in Action, Indie, and Simulation on Steam and both list Multi-player, Online Co-op, and Camera Comfort, 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
 Online: 404 |  Zombie Defense:Breach of The Undead | |
|---|---|---|
| Released | 2026 | — |
| Genres | Action, Indie, Adventure, Simulation, Massively Multiplayer | Action, Indie, Simulation, Casual |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | Price unknown | Price unknown |
| Steam reviews | — | — |
| Multiplayer | Multi-player, Online Co-op, Co-op | Multi-player, Online Co-op, Co-op |
| Developers | Cornfield Games | kairainteractive |
Side by side
- Both share Action, Indie, Simulation on Steam.
- Both support cooperative play.
Online: 404 vs Zombie Defense:Breach of The Undead — FAQ
- Are Online: 404 and Zombie Defense:Breach of The Undead similar?
- They overlap on Action, Indie, Simulation 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 Online: 404 and Zombie Defense:Breach of The Undead have co-op?
- Yes — both list a co-op category on Steam. Specifics differ: Online: 404 ships Online Co-op, Co-op; Zombie Defense:Breach of The Undead ships Online Co-op, Co-op.