Choose Portal
Choose Portal if you want the Includes Source SDK, Subtitle Options, and Camera Comfort side of the pairing. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 81,472 Steam reviews back the pick.
Portal and Mayhem in Single Valley both land in Action 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 Action games on Steam. Portal (2007) is 14 years older than Mayhem in Single Valley (2021). Portal scores higher on Steam reviews (98.7% positive) than Mayhem in Single Valley (75.9% positive). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.
Choose Portal if you want the Includes Source SDK, Subtitle Options, and Camera Comfort side of the pairing. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 81,472 Steam reviews back the pick.
Choose Mayhem in Single Valley if you want an Indie and Adventure experience. On Steam, it's currently about 70% cheaper on the Steam Store. Mayhem in Single Valley launched in 2021.
Both Portal and Mayhem in Single Valley sit in Action 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.
Portal | Mayhem in Single Valley | |
|---|---|---|
| Released | 2007 | 2021 |
| Genres | Action | Action, Indie, Adventure |
| Platforms | Windows, Linux | Windows |
| Steam Deck | Deck Verified | Deck Playable |
| Price | 9.99 USD | 2.99 USD |
| Steam reviews | 98.7% positive (81,472 reviews) | 75.9% positive (58 reviews) |
| Multiplayer | Single-player only | Single-player only |
| Developers | Valve | Fluxscopic Ltd. |
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