Games like Winter Survivor Protocol
Games like Winter Survivor Protocol include 7 Days to Die, Fallout 4, Project Zomboid, Fallout: New Vegas, and SurrounDead. We matched them by the tags players give Winter Survivor Protocol on Steam (Adventure, RPG, Simulation, Zombies, and Open World): closest matches first, and among equally close ones the better-known games.

7 Days to Die
Shared: Zombies · Open World · Survival

Fallout 4
Shared: Open World · RPG · Adventure

Project Zomboid
Shared: Zombies · Open World · Survival

Fallout: New Vegas
Shared: RPG · Open World · Post-apocalyptic

SurrounDead
Shared: Zombies · Open World · Post-apocalyptic

Days Gone
Shared: Zombies · Open World · Post-apocalyptic

The Long Dark
Shared: Open World · Adventure · Survival

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Open World · Post-apocalyptic · RPG

Hogwarts Legacy
Shared: Adventure · Open World · RPG

Assassin's Creed® Odyssey
Shared: RPG · Open World · Action-Adventure

Crimson Desert Enhanced
Shared: Adventure · Open World · RPG

The Long Drive
Shared: Open World · Adventure · Post-apocalyptic

The Elder Scrolls IV: Oblivion Remastered
Shared: RPG · Adventure · Open World

Rise of the Tomb Raider™
Shared: Adventure · Open World · Action-Adventure

Kenshi
Shared: RPG · Open World · Simulation

My Time at Portia
Shared: RPG · Open World · Simulation

DYSMANTLE
Shared: Open World · Zombies · RPG

DayZ
Shared: Zombies · Open World · Survival

Don't Starve Together
Shared: Adventure · Open World · Survival

The Forest
Shared: Adventure · Open World · Survival

State of Decay: YOSE
Shared: Zombies · Open World · Post-apocalyptic

Starfield
Shared: RPG · Open World · Exploration

Assassin's Creed® Origins
Shared: Open World · RPG · Action-Adventure

Fallout 3
Shared: RPG · Open World · Post-apocalyptic