Games like The Infinite Manor
Games like The Infinite Manor include Supraland, Portal, Sizeable, The Talos Principle 2, and Blue Prince. We matched them by the tags players give The Infinite Manor on Steam (Casual, Exploration, Puzzle, Time Management, and Hidden Object): closest matches first, and among equally close ones the better-known games.

Supraland
Shared: Exploration · Puzzle Platformer · Puzzle

Portal
Shared: Puzzle · Puzzle Platformer · 3D Platformer

Sizeable
Shared: Casual · Puzzle · Hidden Object

The Talos Principle 2
Shared: Puzzle · Exploration · Puzzle Platformer

Blue Prince
Shared: Puzzle · Exploration · First-Person

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

The House of Da Vinci
Shared: Puzzle · Hidden Object · Exploration

Murders on the Yangtze River
Shared: Puzzle · Exploration · Puzzle Platformer

The Witness
Shared: Exploration · Puzzle · First-Person

The Room 4: Old Sins
Shared: Puzzle · Hidden Object · Exploration

The Unfinished Swan
Shared: Exploration · Puzzle · Casual

FEZ
Shared: Puzzle · Exploration · Casual

Liars Bar
Shared: Casual · FPS · Puzzle

Big Walk
Shared: Exploration · Puzzle · Casual

Moncage
Shared: Casual · Puzzle · Exploration

Riven
Shared: Puzzle · Exploration · First-Person

The Room
Shared: Puzzle · Hidden Object · Casual

Monument Valley 2
Shared: Casual · Puzzle · Exploration

Travellin Cats in Paris
Shared: Hidden Object · Puzzle · Casual

The Exit 8
Shared: Exploration · Puzzle · First-Person

Supraland Six Inches Under
Shared: Exploration · Puzzle Platformer · Puzzle

The Artisan of Glimmith
Shared: Puzzle · Casual · Exploration

Hidden Paws
Shared: Puzzle · Exploration · Hidden Object

Viewfinder
Shared: Puzzle · Puzzle Platformer · First-Person