Games like Firefly Shelter
Games like Firefly Shelter include Platform 8, The Exit 8, What Remains of Edith Finch, Scanner Sombre, and Outer Wilds. We matched them by the tags players give Firefly Shelter on Steam (Exploration, Hidden Object, Puzzle, Simulation, and Action): closest matches first, and among equally close ones the better-known games.

Platform 8
Shared: Simulation · Puzzle · Hidden Object

The Exit 8
Shared: Exploration · Puzzle · Walking Simulator

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

Scanner Sombre
Shared: Exploration · Walking Simulator · Horror

Outer Wilds
Shared: Exploration · Puzzle · Adventure

Summon
Shared: Simulation · Puzzle · Action

Metel - Horror Escape
Shared: Puzzle · Hidden Object · 3D

MiSide
Shared: Psychological Horror · First-Person · 3D

SOMA
Shared: Exploration · Psychological Horror · Horror

Inside the Backrooms
Shared: Puzzle · Exploration · Horror

Firewatch
Shared: Exploration · Walking Simulator · Adventure

Layers of Fear (2016)
Shared: Walking Simulator · Psychological Horror · Horror

Killer Frequency
Shared: Puzzle · Simulation · Exploration

Escape the Backrooms
Shared: Exploration · Horror · Psychological Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Exploration · Horror

INFRA
Shared: Exploration · Puzzle · Walking Simulator

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

Left Alone
Shared: Exploration · Puzzle · Walking Simulator

September 7th
Shared: Exploration · Walking Simulator · Simulation

[Chillas Art] The Convenience Store
Shared: Simulation · Horror · Psychological Horror

The Complex: Expedition
Shared: Exploration · Action · Horror

In Sound Mind
Shared: Puzzle · Action · Psychological Horror

MOLE
Shared: Simulation · Puzzle · Exploration

Riven
Shared: Exploration · Puzzle · First-Person