Games like White Rooms
Games like White Rooms include Portal, Portal 2, The Room, Poppy Playtime, and Quantum Conundrum. We matched them by the tags players give White Rooms on Steam (Casual, Puzzle, First-Person, Minimalist, and Arcade): closest matches first, and among equally close ones the better-known games.

Portal
Shared: Puzzle · First-Person · Puzzle Platformer

Portal 2
Shared: Puzzle · First-Person · Puzzle Platformer

The Room
Shared: Puzzle · Mystery · Casual

Poppy Playtime
Shared: Puzzle · First-Person · Horror

Quantum Conundrum
Shared: Puzzle · First-Person · Casual

Hello Neighbor Alpha 4
Shared: Puzzle · First-Person · Horror

Bendy and the Ink Machine
Shared: First-Person · Puzzle · Horror

The Unfinished Swan
Shared: Puzzle · Casual · Minimalist

LIMBO
Shared: Puzzle · Puzzle Platformer · Indie

Human Fall Flat
Shared: Puzzle · Puzzle Platformer · Adventure

The Death | Thần Trùng
Shared: Puzzle · Casual · Horror

Refunct
Shared: First-Person · 3D Platformer · Casual

Superliminal
Shared: Puzzle · First-Person · Psychedelic

Climb The Backrooms
Shared: Casual · Puzzle · 3D Platformer

Moncage
Shared: Casual · Puzzle · Indie

The Room Two
Shared: Puzzle · Mystery · Horror

Mini Motorways
Shared: Casual · Puzzle · Minimalist

Viewfinder
Shared: Puzzle · First-Person · Puzzle Platformer

A Story About My Uncle
Shared: First-Person · Puzzle · Casual

Zup!
Shared: Casual · Puzzle · Minimalist

The Room 4: Old Sins
Shared: Puzzle · Mystery · First-Person

Amanda the Adventurer
Shared: Puzzle · First-Person · Horror

Firewatch
Shared: First-Person · Mystery · Adventure

The Ball
Shared: First-Person · Puzzle · 3D Platformer