Detective stories where "all the clues are there", the player's goal is to guess the solution, and it's possible to identify the culprit before the final reveal. Suggestions welcome.
Umineko is metafiction in which the characters argue over whether it is a fair-play mystery or a fantasy story, but per that premise, the murders are in fact compliant with whodunnit genre rules.
Paradise Killer
There's one element of the solution that doesn't 100% play fair (IYKYK), but for the most part it does.
Apollo Justice: Ace Attorney Trilogy
Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy
Unheard
Jake Hunter Detective Story: Ghost of the Dusk
Title case specifically.
The Portopia Serial Murder Case
Kamaitachi no Yoru: Rinne Saisei
Alternate Jake Hunter: DAEDALUS The Awakening of Golden Jazz
Toby's Nose
Unheard: The Lethal Script
The second half specifically.
Antony & Cleopatra: Case IV: The Murder of Marlon Brando
Danganronpa Trilogy
Erstwhile
Color the Truth
The Case of the Serialized Killer
Deadline
Layton Brothers: Mystery Room
Banshee's Last Cry
Different port of Kamaitachi no Yoru, but enough differences to list separately.