Choose Gatekeeper
Choose Gatekeeper if you want an Adventure game with Multi-player, Online Co-op, and Co-op. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 1,447 Steam reviews back the pick.
Gatekeeper vs Cosmic Coliseum
Gatekeeper and Cosmic Coliseum 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. Both released in 2025. Cosmic Coliseum scores higher on Steam reviews (91.8% positive) than Gatekeeper (85.2% positive). 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 Cosmic Coliseum
Choose Cosmic Coliseum if you want the Custom Volume Controls, Stereo Sound, and Playable without Timed Input side of the pairing. On Steam, it's currently about 67% cheaper on the Steam Store. Cosmic Coliseum launched in 2025.
Both Gatekeeper and Cosmic Coliseum sit in Action and Indie 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
 Gatekeeper |  Cosmic Coliseum | |
|---|---|---|
| Released | 2025 | 2025 |
| Genres | Action, Indie, Adventure | Action, Indie |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 14.99 USD | 4.99 USD |
| Steam reviews | 85.2% positive (1,447 reviews) | 91.8% positive (49 reviews) |
| Multiplayer | Multi-player, Online Co-op, Co-op | Single-player only |
| Developers | Gravity Lagoon | Exane Games |
Side by side
- Both share Action, Indie on Steam.
- Both released in 2025.
- Cosmic Coliseum scores higher on Steam reviews (91.8% positive) than Gatekeeper (85.2% positive).
- Cosmic Coliseum is currently ~67% cheaper on Steam than Gatekeeper (4.99 USD vs. 14.99 USD).
- Gatekeeper has co-op; Cosmic Coliseum does not.
- Gatekeeper is Deck Verified on Steam Deck; Cosmic Coliseum has no Deck rating yet.
Gatekeeper vs Cosmic Coliseum — FAQ
- Are Gatekeeper and Cosmic Coliseum 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.
- Does Cosmic Coliseum have multiplayer like Gatekeeper?
- No. Gatekeeper supports multiplayer on Steam (Multi-player, Online Co-op, Co-op), while Cosmic Coliseum is listed as single-player only.
- Does Gatekeeper run on Steam Deck?
- Yes — Gatekeeper is rated Deck Verified by Valve. Cosmic Coliseum doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.