Games like One Last Box
Games like One Last Box include Firewatch, What Remains of Edith Finch, Outlast, Fears to Fathom - Woodbury Getaway, and CARIMARA: Beneath the forlorn limbs. We matched them by the tags players give One Last Box on Steam (Adventure, Casual, Walking Simulator, 3D, and Minimalist): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Walking Simulator · Atmospheric

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

Outlast
Shared: First-Person · Horror · Atmospheric

Fears to Fathom - Woodbury Getaway
Shared: Adventure · Casual · Walking Simulator

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

Welcome to Kowloon
Shared: Adventure · Walking Simulator · Atmospheric

Iron Lung
Shared: Atmospheric · Horror · Adventure

Bad Parenting 1: Mr. Red Face
Shared: Adventure · Walking Simulator · 3D

Still Wakes the Deep
Shared: Walking Simulator · Adventure · Horror

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

The Room
Shared: Adventure · Atmospheric · Mystery

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

Scanner Sombre
Shared: Walking Simulator · Adventure · Atmospheric

The Suicide of Rachel Foster
Shared: Walking Simulator · Adventure · Atmospheric

RATSHAKER™
Shared: First-Person · Adventure · Horror

Garten of Banban
Shared: First-Person · 3D · Horror

Fears to Fathom® - Scratch Creek
Shared: Adventure · Casual · Walking Simulator

DAVE THE DIVER
Shared: Casual · Adventure · Pixel Graphics

Journey
Shared: Adventure · Walking Simulator · Atmospheric

The Vanishing of Ethan Carter
Shared: Walking Simulator · Adventure · Atmospheric

Psalm 5:9-13
Shared: Walking Simulator · Horror · 3D

The Death | Thần Trùng
Shared: Adventure · Casual · Horror

That Which Gave Chase
Shared: Walking Simulator · Atmospheric · First-Person

Poppy Playtime
Shared: Horror · First-Person · Adventure