Choose Operation Hardcore
Choose Operation Hardcore if you want an Indie game with Multi-player, Shared/Split Screen, and Shared/Split Screen Co-op. On Steam, it has co-op, so you can bring a friend. Operation Hardcore launched in 2016.
Operation Hardcore vs Guinea Pig Gunner
Operation Hardcore and Guinea Pig Gunner both land in Action, Adventure 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, Adventure on Steam. Operation Hardcore has co-op; Guinea Pig Gunner does not. 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 Guinea Pig Gunner
Choose Guinea Pig Gunner if you want the Stereo Sound and Playable without Timed Input side of the pairing. On Steam, it's a focused single-player run rather than a multiplayer commitment.
Both Operation Hardcore and Guinea Pig Gunner sit in Action and Adventure 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
 Operation Hardcore |  Guinea Pig Gunner | |
|---|---|---|
| Released | 2016 | — |
| Genres | Action, Indie, Adventure | Action, Adventure |
| Platforms | Windows, macOS | Windows, macOS, Linux |
| Steam Deck | Unrated | Unrated |
| Price | 4.99 USD | Price unknown |
| Steam reviews | 9 reviews | — |
| Multiplayer | Multi-player, Shared/Split Screen Co-op, Co-op | Single-player only |
| Developers | Cosmocat | Glowmatic LLC |
Side by side
- Both share Action, Adventure on Steam.
- Operation Hardcore has co-op; Guinea Pig Gunner does not.
Operation Hardcore vs Guinea Pig Gunner — FAQ
- Are Operation Hardcore and Guinea Pig Gunner similar?
- They overlap on Action, Adventure 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 Guinea Pig Gunner have multiplayer like Operation Hardcore?
- No. Operation Hardcore supports multiplayer on Steam (Multi-player, Shared/Split Screen Co-op, Co-op), while Guinea Pig Gunner is listed as single-player only.