Games like Incestuous Affair
Games like Incestuous Affair include Vampires' Melody, Touhou Mystia's Izakaya, Melvor Idle, Under the River, and Dragon Cliff. We matched them by the tags players give Incestuous Affair on Steam (Casual, RPG, Interactive Fiction, JRPG, and Platformer): closest matches first, and among equally close ones the better-known games.

Vampires' Melody
Shared: Casual · Interactive Fiction · Word Game

Touhou Mystia's Izakaya
Shared: Casual · RPG · JRPG

Melvor Idle
Shared: RPG · Casual · Idler

Under the River
Shared: RPG · Interactive Fiction · JRPG

Dragon Cliff
Shared: RPG · Casual · Idler

Retirement Simulator
Shared: RPG · Casual · Simulation

xiuzhen idle
Shared: Casual · RPG · Word Game

Chained Together
Shared: Casual · Platformer · Puzzle Platformer

Our Brief Eternity
Shared: RPG · Interactive Fiction · Word Game

Frontier Hunter: Erza’s Wheel of Fortune
Shared: JRPG · Platformer · 2D Platformer

Billionaire Lovers
Shared: RPG · Casual · Interactive Fiction

月に寄りそう乙女の作法
Shared: Casual · Word Game · Interactive Fiction

Hollow Knight
Shared: Platformer · Souls-like · 2D

Trine 2: Complete Story
Shared: Platformer · Puzzle Platformer · 2D Platformer

Vtuber Simulator : Vtuber
Shared: Casual · RPG · JRPG

Sweet Home
Shared: RPG · Interactive Fiction · Word Game

Braid
Shared: Platformer · 2D Platformer · Puzzle Platformer

灾厄黑龙与谎言公主
Shared: RPG · Interactive Fiction · JRPG

Home Behind
Shared: RPG · Casual · Adventure

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Casual · Strategy

Epic Battle Fantasy 4
Shared: JRPG · RPG · Indie

Vampires' Melody 2
Shared: Interactive Fiction · RPG · JRPG

Chinese Parents
Shared: Casual · RPG · Simulation

FANTASY LIFE i: The Girl Who Steals Time
Shared: Casual · RPG · JRPG