If I don't arbitrarily limit myself to 50 here's the detective games that I always felt bad that they never got much traction because they were amazing. they used to be in the 50 review range but they are slowly but steadily increasing so maybe there's hope for some of them out there.

https://store.steampowered.com/app/2277090/DAEMON_MASQUERADE/

https://store.steampowered.com/app/3193560/Yokai_Landlord_Monster_Mystery/

https://store.steampowered.com/app/3326660/Sofia_in_Exchange_for_Lies/

https://store.steampowered.com/app/1921980/Between_Horizons__A_SciFi_Detective_Adventure/

https://store.steampowered.com/app/1098770/The_Crimson_Diamond/

https://store.steampowered.com/app/1247940/Greyhat__A_Digital_Detective_Adventure/

https://store.steampowered.com/app/2254710/Death_Trick_Double_Blind/

Crimson Diamond is actually getting a sequel, so it can't have done too bad. Between Horizons changed it's cover art to "increase sales" but I think the original artwork was better.