Games like Photon Engineer
Games like Photon Engineer include Outer Wilds, The Talos Principle, What Remains of Edith Finch, Blue Prince, and Firewatch. We matched them by the tags players give Photon Engineer on Steam (Puzzle, Logic, First-Person, Exploration, and Mystery): closest matches first, and among equally close ones the better-known games.

Outer Wilds
Shared: Exploration · Mystery · Space

The Talos Principle
Shared: Puzzle · First-Person · Sci-fi

What Remains of Edith Finch
Shared: First-Person · Mystery · Exploration

Blue Prince
Shared: Puzzle · Exploration · Mystery

Firewatch
Shared: First-Person · Mystery · Atmospheric

Riven
Shared: Puzzle · First-Person · Exploration

The Witness
Shared: Puzzle · First-Person · Exploration

The Turing Test
Shared: Puzzle · First-Person · Sci-fi

Return of the Obra Dinn
Shared: Puzzle · Mystery · First-Person

The Talos Principle 2
Shared: Puzzle · First-Person · Exploration

Deliver Us The Moon
Shared: Space · Puzzle · Adventure

No Man's Sky
Shared: Exploration · Space · Sci-fi

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

Starfield
Shared: Space · Exploration · First-Person

The Room 4: Old Sins
Shared: Puzzle · Mystery · Adventure

INFRA
Shared: Puzzle · Exploration · First-Person

Quern - Undying Thoughts
Shared: Puzzle · Mystery · Exploration

Call of the Sea
Shared: Puzzle · First-Person · Adventure

Antichamber
Shared: Puzzle · First-Person · Exploration

Obduction
Shared: Puzzle · Exploration · First-Person

Observation
Shared: Puzzle · Space · Sci-fi

SOMA
Shared: Atmospheric · Sci-fi · Exploration

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

The Swapper
Shared: Puzzle · Sci-fi · Space