Gnosia
2019 video game
Gnosia is a 2019 visual novel and social deduction game developed by Petit Depotto. It was originally released in June 2019 for the PlayStation Vita, and was ported to the Nintendo Switch in December 2020, with a Windows version released in January 2022. It also released for PlayStation 4, PlayStation 5, Xbox One and Xbox Series X/S in December 2023.
The game's setting takes place on a spaceship in an era where space exploration is at odds with a deadly parasitic disease called gnosia, which seeks to rid humanity by possessing its host. The player takes control of an amnesiac who either chooses to investigate potentially infected crewmates or become one of the infected. At the same time, the player also tries to end a time loop by harnessing the "silver key" inside of them to acquire enough knowledge needed to end it.
An anime television series adaptation produced by Domerica aired from October 2025 to March 2026.
Gameplay
This game uses a visual novel role-playing game format mixed with an RNG social deduction game. It is single player and utilizes a timeloop structure to create new situations. Aboard a spaceship, the player and several NPCs must deduce who on board is a Gnosia, an alien-like creature that will kill the regular humans on board.
“Gnosia” enters the record as 2019 video game. Crown Archives preserves that source wording while asking what Gnosia, video and game can confirm, complicate or overturn.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 29, 2026. The linked authority identifier is Q106624394. 5 of 9 selected statements include explicit references; 9 carry qualifiers and 0 use preferred rank. The first chronological checks are 2019, 2020, 2022 and 2023.
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