Games like Touhou: Fading Illusion - Underworld Chapter
Games like Touhou: Fading Illusion - Underworld Chapter include The Wolf Among Us, Mirror 2: Project X, The Hungry Lamb: Traveling in the Late Ming Dynasty, Noctuary, and Trials of Innocence. We matched them by the tags players give Touhou: Fading Illusion - Underworld Chapter on Steam (Adventure, Casual, Visual Novel, Interactive Fiction, and Detective): closest matches first, and among equally close ones the better-known games.

The Wolf Among Us
Shared: Adventure · Detective · Visual Novel

Mirror 2: Project X
Shared: Visual Novel · Interactive Fiction · Casual

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

Noctuary
Shared: Interactive Fiction · Visual Novel · Adventure

Trials of Innocence
Shared: Visual Novel · Detective · Interactive Fiction

Florence
Shared: Casual · Adventure · Story Rich

No Case Should Remain Unsolved
Shared: Visual Novel · Interactive Fiction · Adventure

Lay a Beauty to Rest: The Darkness Peach Blossom Spring
Shared: Adventure · Visual Novel · Interactive Fiction

Roadwarden
Shared: Adventure · Text-Based · Interactive Fiction

Suzerain
Shared: Visual Novel · Interactive Fiction · Text-Based

Vampires' Melody
Shared: Casual · Adventure · Visual Novel

Phoenix Wright: Ace Attorney Trilogy
Shared: Visual Novel · Detective · Story Rich

Coffee Talk
Shared: Visual Novel · Interactive Fiction · Casual

ATRI -My Dear Moments-
Shared: Visual Novel · Casual · Story Rich

The Life and Suffering of Sir Brante
Shared: Interactive Fiction · Visual Novel · Story Rich

LoveChoice
Shared: Visual Novel · Story Rich · Casual

Senren * Banka
Shared: Visual Novel · Casual · Adventure

AI: The Somnium Files
Shared: Visual Novel · Adventure · Detective

The Cosmic Wheel Sisterhood
Shared: Interactive Fiction · Visual Novel · Adventure

Raging Loop
Shared: Adventure · Visual Novel · Detective

Road to Empress Ⅱ
Shared: Adventure · Interactive Fiction · Casual

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

Love, Money, Rock'n'Roll
Shared: Visual Novel · Detective · Story Rich

Far Away
Shared: Visual Novel · Story Rich · Adventure