Games like Phrixothrix
Games like Phrixothrix include The Room 4: Old Sins, Outer Wilds, Stray, The Talos Principle, and Quern - Undying Thoughts. We matched them by the tags players give Phrixothrix on Steam (Adventure, Puzzle, Exploration, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

The Room 4: Old Sins
Shared: Puzzle · Adventure · Point & Click

Outer Wilds
Shared: Exploration · Adventure · Puzzle

Stray
Shared: Adventure · Exploration · Atmospheric

The Talos Principle
Shared: Puzzle · First-Person · Atmospheric

Quern - Undying Thoughts
Shared: Adventure · Puzzle · Exploration

Chants of Sennaar
Shared: Adventure · Puzzle · Singleplayer

Myst
Shared: Adventure · Puzzle · Exploration

Riven
Shared: Adventure · Puzzle · Exploration

The Witness
Shared: Puzzle · Exploration · First-Person

The Room
Shared: Puzzle · Adventure · Atmospheric

Blue Prince
Shared: Puzzle · Exploration · Adventure

Fallout 4
Shared: Exploration · Adventure · Singleplayer

Five Nights at Freddy's: Security Breach
Shared: First-Person · Singleplayer · Exploration

Firewatch
Shared: Adventure · Atmospheric · First-Person

The House of Da Vinci
Shared: Puzzle · Exploration · Adventure

COCOON
Shared: Adventure · Puzzle · Exploration

PEAK
Shared: Adventure · Exploration · First-Person

The Room Three
Shared: Puzzle · Adventure · Atmospheric

What Remains of Edith Finch
Shared: Atmospheric · Adventure · Exploration

Antichamber
Shared: Puzzle · First-Person · Exploration

FAR: Lone Sails
Shared: Adventure · Atmospheric · Exploration

The Long Dark
Shared: Exploration · Adventure · Atmospheric

Big Walk
Shared: Puzzle · Exploration · Adventure

Monument Valley
Shared: Puzzle · Adventure · Exploration