Games like Halloween Waifu
Games like Halloween Waifu include Unpacking, Is This Seat Taken?, Zup! S, Chill with You : Lo-Fi Story, and A Little to the Left. We matched them by the tags players give Halloween Waifu on Steam (Casual, Puzzle, Anime, Design & Illustration, and Tabletop): closest matches first, and among equally close ones the better-known games.

Unpacking
Shared: Casual · Relaxing · Puzzle

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

Zup! S
Shared: Casual · Puzzle · Relaxing

Chill with You : Lo-Fi Story
Shared: Casual · Anime · Relaxing

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

Hidden Folks
Shared: Casual · Puzzle · Relaxing

Monument Valley
Shared: Puzzle · Casual · Relaxing

Glass Masquerade
Shared: Puzzle · Casual · Relaxing

Gorogoa
Shared: Puzzle · Casual · Atmospheric

Hook
Shared: Casual · Puzzle · Relaxing

Carto
Shared: Puzzle · Relaxing · Cute

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Relaxing · Puzzle

Assemble with Care
Shared: Casual · Puzzle · Relaxing

Machinarium
Shared: Puzzle · Casual · Atmospheric

Behind the Frame: The Finest Scenery
Shared: Puzzle · Atmospheric · Anime

Sudocats
Shared: Casual · Puzzle · Relaxing

Zup! F
Shared: Casual · Puzzle · Relaxing

Zup!
Shared: Casual · Puzzle · Relaxing

The Last Campfire
Shared: Puzzle · Relaxing · Atmospheric

Muse Dash
Shared: Anime · Casual · Cute

klocki
Shared: Puzzle · Casual · Relaxing

Zup! 2
Shared: Casual · Puzzle · 2D

your wife
Shared: Casual · Anime · Cute

Storyteller
Shared: Puzzle · 2D · Casual