Games like Beside Myself
Games like Beside Myself include Platform 8, September 7th, Firewatch, I'm counting to 6..., and What Remains of Edith Finch. We matched them by the tags players give Beside Myself on Steam (Adventure, Simulation, Walking Simulator, 3D Platformer, and Exploration): closest matches first, and among equally close ones the better-known games.

Platform 8
Shared: Adventure · Walking Simulator · Simulation

September 7th
Shared: Walking Simulator · Exploration · 3D Platformer

Firewatch
Shared: Adventure · Walking Simulator · Exploration

I'm counting to 6...
Shared: Adventure · Simulation · Walking Simulator

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

Find Yourself
Shared: Simulation · Walking Simulator · Exploration

Scanner Sombre
Shared: Walking Simulator · Adventure · Exploration

April 24th
Shared: Simulation · Walking Simulator · 3D Platformer

The Long Dark
Shared: Exploration · Adventure · Simulation

Father's Day
Shared: Simulation · Walking Simulator · 3D Platformer

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

The Exit 8
Shared: Walking Simulator · Exploration · 3D

Millennium Dream
Shared: Adventure · Walking Simulator · Exploration

POOLS
Shared: Walking Simulator · Exploration · Adventure

Exo One
Shared: Adventure · Exploration · Walking Simulator

Summer of '58
Shared: Walking Simulator · Cinematic · First-Person

Christmas Nightmare
Shared: Adventure · Simulation · Walking Simulator

SnowRunner
Shared: Simulation · Adventure · Exploration

Fears to Fathom - Ironbark Lookout
Shared: Adventure · Exploration · Walking Simulator

PEAK
Shared: Adventure · Exploration · 3D

DEATH STRANDING DIRECTOR'S CUT
Shared: Walking Simulator · Adventure · Cinematic

Slime Rancher
Shared: Adventure · Exploration · Simulation

Killer Frequency
Shared: Adventure · Simulation · Walking Simulator