Games like 遗憾
Games like 遗憾 include Webbed, Until Then, Billionaire Lovers, Vampires' Melody, and Stardew Valley. We matched them by the tags players give 遗憾 on Steam (Casual, RPG, Interactive Fiction, Visual Novel, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Webbed
Shared: 2D Platformer · Puzzle Platformer · Pixel Graphics

Until Then
Shared: Visual Novel · Interactive Fiction · Pixel Graphics

Billionaire Lovers
Shared: RPG · Visual Novel · Casual

Vampires' Melody
Shared: Casual · Visual Novel · Interactive Fiction

Stardew Valley
Shared: RPG · Pixel Graphics · Casual

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

To the Moon
Shared: Interactive Fiction · RPG · Pixel Graphics

Touhou Mystia's Izakaya
Shared: Casual · RPG · Pixel Graphics

DAVE THE DIVER
Shared: Casual · Pixel Graphics · RPG

Impostor Factory
Shared: RPG · Pixel Graphics · 2D

Undertale
Shared: RPG · Pixel Graphics · 2D

A Bird Story
Shared: Interactive Fiction · Pixel Graphics · RPG

Florence
Shared: Casual · Interactive Fiction · Visual Novel

Finding Paradise
Shared: RPG · Pixel Graphics · 2D

Sanfu
Shared: RPG · Visual Novel · 2D

Aliya: Timelink
Shared: RPG · Interactive Fiction · Visual Novel

Pizza Tower
Shared: 2D Platformer · Cartoony · Pixel Graphics

Coffee Talk
Shared: Visual Novel · Interactive Fiction · Pixel Graphics

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

Unpacking
Shared: Casual · Pixel Graphics · Cute

Beacon Pines
Shared: Visual Novel · Interactive Fiction · Casual

Melvor Idle
Shared: RPG · Casual · 2D

Celeste
Shared: Pixel Graphics · 2D Platformer · 2D

Evan's Remains
Shared: Casual · Visual Novel · Puzzle Platformer