Games like Zone-0
Games like Zone-0 include Firewatch, The Stanley Parable, POOLS, What Remains of Edith Finch, and Amenti. We matched them by the tags players give Zone-0 on Steam (Exploration, Walking Simulator, Realistic, Psychological, and Adventure): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Walking Simulator · Adventure · Exploration

The Stanley Parable
Shared: Walking Simulator · Psychological · Exploration

POOLS
Shared: Walking Simulator · Exploration · Realistic

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

Amenti
Shared: Exploration · Adventure · Walking Simulator

Slime Rancher
Shared: Exploration · Adventure · Singleplayer

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

Fallout 4
Shared: Exploration · Singleplayer · Adventure

The Long Dark
Shared: Exploration · Singleplayer · Adventure

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

DEATH STRANDING 2: ON THE BEACH
Shared: Exploration · Walking Simulator · Adventure

Wuthering Waves
Shared: Free to Play · Exploration · Adventure

Stray
Shared: Adventure · Exploration · Singleplayer

Crimson Desert Enhanced
Shared: Exploration · Singleplayer · Adventure

Cairn
Shared: Exploration · Adventure · Singleplayer

Rise of the Tomb Raider™
Shared: Adventure · Exploration · Singleplayer

Lushfoil Photography Sim
Shared: Exploration · Walking Simulator · Realistic

Gone Home
Shared: Walking Simulator · Exploration · Adventure

Hellblade: Senua's Sacrifice
Shared: Psychological · Singleplayer · Adventure

Outcore: Desktop Adventure
Shared: Exploration · Adventure · Free to Play

Forza Horizon 5
Shared: Realistic · Exploration · Adventure

The Park®
Shared: Walking Simulator · Exploration · Adventure

The Exit 8
Shared: Exploration · Walking Simulator · Adventure

Riven
Shared: Exploration · Adventure · Singleplayer