Games like Goodbye
Games like Goodbye include Firewatch, Before Your Eyes, Slime Rancher 2, Fresh Start Cleaning Simulator, and Killer Frequency. We matched them by the tags players give Goodbye on Steam (Adventure, Simulation, Interactive Fiction, Walking Simulator, and 3D): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

Before Your Eyes
Shared: Interactive Fiction · Adventure · First-Person

Slime Rancher 2
Shared: Adventure · Simulation · First-Person

Fresh Start Cleaning Simulator
Shared: 3D · First-Person · Simulation

Killer Frequency
Shared: Adventure · Interactive Fiction · Simulation

Fishing Planet
Shared: Simulation · Realistic · Free to Play

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

Crime Scene Cleaner
Shared: Simulation · First-Person · Atmospheric

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

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · Atmospheric

POOLS
Shared: Walking Simulator · Realistic · Atmospheric

Millennium Dream
Shared: Adventure · Walking Simulator · Emotional

Journey
Shared: Adventure · Atmospheric · Walking Simulator

Totally Accurate Battle Simulator
Shared: Simulation · Adventure · Realistic

Electrician Simulator
Shared: Simulation · First-Person · Adventure

PowerWash Simulator
Shared: Simulation · First-Person · 3D

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

Planet Coaster
Shared: Simulation · Family Friendly · Adventure

Farming Simulator 25
Shared: Simulation · 3D · Realistic

[Chillas Art] The Convenience Store
Shared: Adventure · Simulation · Atmospheric

The Cabin Factory
Shared: Walking Simulator · Adventure · First-Person

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

Internet Cafe Simulator 2
Shared: Simulation · 3D · First-Person

Slime Rancher
Shared: Adventure · First-Person · Simulation