From Tokyo Dark Wiki
The S.P.I.N system (Sanity, Professionalism, Investigation, Neurosis) keeps track of every decision you make, changing how other characters react and the actions available to you.
List of attributes[edit | edit source]
|Sanity||Irrational choices, looking at unexplained objects, interacting with the paranormal||• Low sanity leads to hallucinations and eventual breakdown.|
|Professionalism||Taking actions and making choices as a detective would|| • Low professionalism gives you options that are not entirely legal, for example breaking and entering. |
• High professionalism makes others respect you.
|Investigation||Searching for clues, trying to solve the case||• High investigative skills let you notice more hotspots and items to interact with.|
|Neurosis||Repeating the same action more than once, speaking to characters after conversations have finished, randomly interacting with objects||• If Detective Itō becomes highly neurotic her sanity decreases faster and is harder to regain.|