Games like Last Signal
Games like Last Signal include Firewatch, The Exit 8, What Remains of Edith Finch, Scanner Sombre, and Ultimate Fishing Simulator. We matched them by the tags players give Last Signal on Steam (Exploration, Immersive Sim, Nature, Walking Simulator, and 3D): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · Exploration · First-Person

The Exit 8
Shared: Exploration · Walking Simulator · Immersive Sim

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

Scanner Sombre
Shared: Exploration · Walking Simulator · First-Person

Ultimate Fishing Simulator
Shared: 3D · Nature · Immersive Sim

Internet Cafe Simulator 2
Shared: Exploration · 3D · Simulation

The Long Dark
Shared: Exploration · First-Person · Atmospheric

Bright Lights of Svetlov
Shared: Walking Simulator · Exploration · First-Person

The Cabin Factory
Shared: Walking Simulator · Immersive Sim · Choices Matter

Lushfoil Photography Sim
Shared: Exploration · Nature · Walking Simulator

Gone Home
Shared: Exploration · Walking Simulator · First-Person

INFRA
Shared: Exploration · Walking Simulator · First-Person

Outer Wilds
Shared: Exploration · Mystery · Adventure

CARIMARA: Beneath the forlorn limbs
Shared: Exploration · 3D · Walking Simulator

Platform 8
Shared: Walking Simulator · Exploration · Immersive Sim

The Witness
Shared: Exploration · First-Person · Walking Simulator

The Forgotten City
Shared: Exploration · Choices Matter · First-Person

PEAK
Shared: Exploration · First-Person · 3D

The Stanley Parable
Shared: Walking Simulator · First-Person · Exploration

September 7th
Shared: Exploration · Walking Simulator · First-Person

Quern - Undying Thoughts
Shared: Exploration · Walking Simulator · First-Person

Millennium Dream
Shared: Exploration · Walking Simulator · Immersive Sim

Blue Prince
Shared: Exploration · First-Person · Mystery

Riven
Shared: Exploration · First-Person · 3D