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.
Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy
Agatha Christie: The ABC Murders
Layton Brothers: Mystery Room
Unheard
Apollo Justice: Ace Attorney Trilogy
Danganronpa Trilogy
The Portopia Serial Murder Case
The Centennial Case: A Shijima Story
Kamaitachi no Yoru: Rinne Saisei
Alternate Jake Hunter: DAEDALUS The Awakening of Golden Jazz
Jake Hunter Detective Story: Ghost of the Dusk
Title case specifically.
Banshee's Last Cry
Different port of Kamaitachi no Yoru, but enough differences to list separately.
Deadline
Unheard: The Lethal Script
The second half specifically.
The Case of the Serialized Killer
Color the Truth
Toby's Nose
Antony & Cleopatra: Case IV: The Murder of Marlon Brando