Amnesia: The Dark Descent - Trailer - Amnesia: The Dark Descent

This 2010 main game is a foundational survival horror adventure where you explore the dark Prussian Brennenburg Castle as Daniel, an amnesiac tasked with murdering the Baron. Core gameplay emphasizes exploration, environmental puzzle-solving, and absolute evasion, as the game features no combat mechanics. A distinctive feature is the Sanity Mechanic; staying in the dark or witnessing horrors degrades your mental state, causing hallucinations that complicate survival against the pursuing entities. It is available on PC, consoles, and Switch.