Choose 99% - 残された被検体 -
Choose 99% - 残された被検体 - if you want an Action experience. 99% - 残された被検体 - launched in 2025.
99% - 残された被検体 - vs The Observation Exit
99% - 残された被検体 - and The Observation Exit both land in 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 Indie, Simulation on Steam. 99% - 残された被検体 - (2025) is 1 year older than The Observation Exit (2026). 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 The Observation Exit
Choose The Observation Exit if you want an Adventure game with Custom Volume Controls, Stereo Sound, and Playable without Timed Input. The Observation Exit launched in 2026.
Both 99% - 残された被検体 - and The Observation Exit sit in Indie and Simulation 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
 99% - 残された被検体 - |  The Observation Exit | |
|---|---|---|
| Released | 2025 | 2026 |
| Genres | Action, Indie, Simulation | Indie, Adventure, Simulation |
| Platforms | Windows | Windows |
| Steam Deck | Unrated | Unrated |
| Price | 5.99 USD | Price unknown |
| Steam reviews | — | — |
| Multiplayer | Single-player only | Single-player only |
| Developers | DCG Entertainment,Inc. | Kappatau Games |
Side by side
- Both share Indie, Simulation on Steam.
- 99% - 残された被検体 - (2025) is 1 year older than The Observation Exit (2026).
99% - 残された被検体 - vs The Observation Exit — FAQ
- Should I play 99% - 残された被検体 - or The Observation Exit first?
- If you want chronology, 99% - 残された被検体 - (2025) came out before The Observation Exit (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 99% - 残された被検体 - and The Observation Exit similar?
- They overlap on 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.