Games like Stargaze
Games like Stargaze include Outer Wilds, The Room, The House of Da Vinci, Obduction, and The Witness. We matched them by the tags players give Stargaze on Steam (Hidden Object, Puzzle, Space, Exploration, and Family Friendly): closest matches first, and among equally close ones the better-known games.

Outer Wilds
Shared: Space · Exploration · Puzzle

The Room
Shared: Puzzle · Hidden Object · Atmospheric

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

Obduction
Shared: Puzzle · Exploration · VR

The Witness
Shared: Puzzle · Exploration · Atmospheric

TOEM: A Photo Adventure
Shared: Puzzle · Exploration · Hidden Object

Whisper of the House
Shared: Hidden Object · Puzzle · Relaxing

The Room Two
Shared: Puzzle · Hidden Object · Atmospheric

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

Riven
Shared: Puzzle · Exploration · Atmospheric

Big Walk
Shared: Puzzle · Exploration · Relaxing

Antichamber
Shared: Puzzle · Exploration · Surreal

Birth
Shared: Puzzle · Hidden Object · Surreal

The Last Campfire
Shared: Puzzle · Atmospheric · Adventure

Carto
Shared: Puzzle · Exploration · Relaxing

Blue Prince
Shared: Puzzle · Exploration · Mystery

COCOON
Shared: Puzzle · Exploration · Atmospheric

No Man's Sky
Shared: Space · Exploration · Atmospheric

Sizeable
Shared: Puzzle · Hidden Object · Exploration

The Room Three
Shared: Puzzle · Hidden Object · Atmospheric

Moncage
Shared: Puzzle · Surreal · Atmospheric

ABZU
Shared: Exploration · Atmospheric · Relaxing

Kairo
Shared: Puzzle · Exploration · Atmospheric

Morphopolis
Shared: Puzzle · Hidden Object · Indie