Games like The Grade 5B Case Files Ch3 - The First Fall
Games like The Grade 5B Case Files Ch3 - The First Fall include Tales of the Black Forest, Magical Girl Witch Trials, Sanfu, Murders on the Yangtze River, and Danganronpa V3: Killing Harmony. We matched them by the tags players give The Grade 5B Case Files Ch3 - The First Fall on Steam (Adventure, RPG, Detective, Female Protagonist, and Mystery): closest matches first, and among equally close ones the better-known games.

Tales of the Black Forest
Shared: RPG · Adventure · Female Protagonist

Magical Girl Witch Trials
Shared: Female Protagonist · Detective · Visual Novel

Sanfu
Shared: RPG · Adventure · Mystery

Murders on the Yangtze River
Shared: Adventure · Detective · Mystery

Danganronpa V3: Killing Harmony
Shared: Detective · Female Protagonist · Visual Novel

月华辉映之刻
Shared: Female Protagonist · RPG · Adventure

Phoenix Wright: Ace Attorney Trilogy
Shared: Detective · Visual Novel · Mystery

No Case Should Remain Unsolved
Shared: Adventure · Visual Novel · Female Protagonist

To the Moon
Shared: Adventure · Indie · RPG

WILL: A Wonderful World / WILL:美好世界
Shared: RPG · Adventure · Female Protagonist

Raging Loop
Shared: Adventure · Mystery · Visual Novel

Danganronpa: Trigger Happy Havoc
Shared: Detective · Visual Novel · Mystery

Danganronpa 2: Goodbye Despair
Shared: Detective · Mystery · Visual Novel

Roadwarden
Shared: RPG · Adventure · Indie

Threefold Recital
Shared: Detective · Mystery · Visual Novel

Florence
Shared: Adventure · Indie · Female Protagonist

Finding Paradise
Shared: Adventure · RPG · Pixel Graphics

Mirror 2: Project X
Shared: Female Protagonist · Visual Novel · RPG

Back to the Dawn
Shared: RPG · Detective · Adventure

Refind Self: The Personality Test Game
Shared: Adventure · Female Protagonist · Visual Novel

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Visual Novel · Adventure · Interactive Fiction

The Deed
Shared: Adventure · RPG · Detective

Tails Noir
Shared: Detective · Adventure · Visual Novel

OneShot
Shared: Indie · Adventure · Pixel Graphics