Games like Pet Diary
Games like Pet Diary include Beacon Pines, Billionaire Lovers, To the Moon, Is This Seat Taken?, and Assemble with Care. We matched them by the tags players give Pet Diary on Steam (Casual, RPG, Puzzle, Visual Novel, and Dogs): closest matches first, and among equally close ones the better-known games.

Beacon Pines
Shared: Visual Novel · Cozy · Emotional

Billionaire Lovers
Shared: RPG · Visual Novel · Casual

To the Moon
Shared: Emotional · RPG · Interactive Fiction

Is This Seat Taken?
Shared: Casual · Puzzle · Cozy

Assemble with Care
Shared: Casual · Puzzle · Indie

Zup! S
Shared: Casual · Puzzle · 2D

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

A Little to the Left
Shared: Puzzle · Casual · Singleplayer

Sanfu
Shared: RPG · Puzzle · Visual Novel

Dogs Organized Neatly
Shared: Casual · Dogs · Puzzle

Until Then
Shared: Visual Novel · Emotional · Interactive Fiction

Sweet Home
Shared: RPG · Visual Novel · Interactive Fiction

Unpacking
Shared: Casual · Puzzle · Singleplayer

Far Away
Shared: Visual Novel · Singleplayer · Casual

Florence
Shared: Casual · Visual Novel · Interactive Fiction

There Is No Game: Wrong Dimension
Shared: Puzzle · Casual · Indie

Cyber Manhunt
Shared: RPG · Puzzle · Singleplayer

Impostor Factory
Shared: RPG · Emotional · Singleplayer

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

Emily is Away
Shared: Casual · Interactive Fiction · Singleplayer

OneShot
Shared: Puzzle · Indie · Singleplayer

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

Finding Paradise
Shared: RPG · Emotional · Singleplayer

LEGO® Builder's Journey
Shared: Casual · Puzzle · Cozy

