Games like 辐海
Games like 辐海 include Project Zomboid, The Scroll of Taiwu : Beyond The Dome, Mount & Blade II: Bannerlord, 鬼谷八荒 Tale of Immortal, and Sands of Salzaar. We matched them by the tags players give 辐海 on Steam (RPG, Sandbox, 3D, Zombies, and Survival Horror): closest matches first, and among equally close ones the better-known games.

Project Zomboid
Shared: Zombies · Sandbox · Open World

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Sandbox · Open World

Mount & Blade II: Bannerlord
Shared: RPG · Open World · Sandbox

鬼谷八荒 Tale of Immortal
Shared: Sandbox · RPG · Singleplayer

Sands of Salzaar
Shared: RPG · Open World · Sandbox

Mist Survival
Shared: Zombies · Open World · Sandbox

Don't Starve Together
Shared: Open World · Sandbox · RPG

Mount & Blade: Warband
Shared: RPG · Sandbox · Open World

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

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

Fallout 4
Shared: RPG · Open World · Singleplayer

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Open World · Singleplayer

Dying Light
Shared: Zombies · Survival Horror · Open World

Kenshi
Shared: Sandbox · RPG · Open World

Stardew Valley
Shared: RPG · Sandbox · Simulation

Totally Accurate Battle Simulator
Shared: Sandbox · Simulation · Singleplayer

The Forest
Shared: Open World · Survival Horror · Sandbox

State of Decay: YOSE
Shared: Zombies · Open World · RPG

Graveyard Keeper
Shared: RPG · Sandbox · Singleplayer

河洛群俠傳 (Ho Tu Lo Shu : The Books of Dragon)
Shared: RPG · Sandbox · Open World

Fallout: New Vegas
Shared: RPG · Open World · Singleplayer

Slime Rancher
Shared: Open World · Singleplayer · Sandbox

Kingdom Come: Deliverance II
Shared: RPG · Open World · Singleplayer

The Long Dark
Shared: Open World · Singleplayer · Sandbox