Choose The Test: Hypothesis Rising
Choose The Test: Hypothesis Rising if you want an Adventure, Simulation, and Casual experience. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 5,459 Steam reviews back the pick.
The Test: Hypothesis Rising vs Who Killed Mr X
The Test: Hypothesis Rising and Who Killed Mr X both land in Indie, RPG 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, RPG on Steam. The Test: Hypothesis Rising (2020) is 6 years older than Who Killed Mr X (2026). The Test: Hypothesis Rising is Deck Verified on Steam Deck; Who Killed Mr X 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 Who Killed Mr X
Choose Who Killed Mr X if you want the Custom Volume Controls, Playable without Timed Input, and Keyboard Only Option side of the pairing. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Who Killed Mr X launched in 2026.
Both The Test: Hypothesis Rising and Who Killed Mr X sit in Indie and RPG 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
 The Test: Hypothesis Rising |  Who Killed Mr X | |
|---|---|---|
| Released | 2020 | 2026 |
| Genres | Indie, Adventure, Simulation, RPG, Casual | Indie, RPG |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 1.99 USD | Price unknown |
| Steam reviews | 97.7% positive (5,459 reviews) | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | Randumb Studios | ENDAI |
Side by side
- Both share Indie, RPG on Steam.
- The Test: Hypothesis Rising (2020) is 6 years older than Who Killed Mr X (2026).
- The Test: Hypothesis Rising is Deck Verified on Steam Deck; Who Killed Mr X has no Deck rating yet.
The Test: Hypothesis Rising vs Who Killed Mr X — FAQ
- Should I play The Test: Hypothesis Rising or Who Killed Mr X first?
- If you want chronology, The Test: Hypothesis Rising (2020) came out before Who Killed Mr X (2026). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
- Are The Test: Hypothesis Rising and Who Killed Mr X similar?
- They overlap on Indie, RPG 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 The Test: Hypothesis Rising run on Steam Deck?
- Yes — The Test: Hypothesis Rising is rated Deck Verified by Valve. Who Killed Mr X doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.