Games like NOSTALGIC TRAIN
Games like NOSTALGIC TRAIN include Firewatch, What Remains of Edith Finch, The Beginner's Guide, Layers of Fear (2016), and The Long Dark. We matched them by the tags players give NOSTALGIC TRAIN on Steam (Walking Simulator, Atmospheric, Trains, Investigation, and Emotional): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Atmospheric · Walking Simulator · Adventure

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

The Beginner's Guide
Shared: Walking Simulator · Atmospheric · First-Person

Layers of Fear (2016)
Shared: Atmospheric · Walking Simulator · First-Person

The Long Dark
Shared: Atmospheric · First-Person · Open World

Gone Home
Shared: Walking Simulator · Atmospheric · Indie

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

Outlast
Shared: Atmospheric · First-Person · Horror

Amnesia: A Machine For Pigs
Shared: Walking Simulator · Atmospheric · First-Person

The Painscreek Killings
Shared: Investigation · Atmospheric · Walking Simulator

Blair Witch
Shared: Adventure · Walking Simulator · First-Person

Choo-Choo Charles
Shared: Trains · First-Person · Open World

The Forgotten City
Shared: Adventure · Investigation · Walking Simulator

The Vanishing of Ethan Carter
Shared: Atmospheric · Walking Simulator · First-Person

Before Your Eyes
Shared: Emotional · Walking Simulator · First-Person

Among the Sleep - Enhanced Edition
Shared: Atmospheric · Walking Simulator · Indie

DEATH STRANDING DIRECTOR'S CUT
Shared: Walking Simulator · Atmospheric · Open World

INFRA
Shared: Atmospheric · Walking Simulator · First-Person

Mouthwashing
Shared: Atmospheric · Walking Simulator · Indie

The Forest
Shared: Adventure · Open World · First-Person

Valley
Shared: First-Person · Adventure · Atmospheric

Kholat
Shared: Atmospheric · Walking Simulator · Horror

Dagon: by H. P. Lovecraft
Shared: Atmospheric · First-Person · Visual Novel

Slender: The Arrival
Shared: First-Person · Atmospheric · Indie

