Games like Project Zomboid
Games like Project Zomboid include 7 Days to Die, Rust, Terraria, Don't Starve Together, and Raft. We matched them by the tags players give Project Zomboid on Steam (Survival, Zombies, Open World, Multiplayer, and Open World Survival Craft): closest matches first, and among equally close ones the better-known games.

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

Rust
Shared: Survival · Open World · Multiplayer

Terraria
Shared: Survival · Open World Survival Craft · Multiplayer

Don't Starve Together
Shared: Survival · Multiplayer · Open World Survival Craft

Raft
Shared: Survival · Multiplayer · Open World Survival Craft

ARK: Survival Evolved
Shared: Survival · Open World Survival Craft · Open World

Palworld
Shared: Survival · Open World · Multiplayer

Valheim
Shared: Survival · Open World Survival Craft · Open World

The Forest
Shared: Survival · Open World Survival Craft · Open World

Miscreated
Shared: Survival · Open World · Open World Survival Craft

DayZ
Shared: Survival · Zombies · Open World

Sons Of The Forest
Shared: Survival · Open World · Multiplayer

Once Human
Shared: Open World · Survival · Multiplayer

Conan Exiles Enhanced
Shared: Survival · Open World · Open World Survival Craft

Stranded Deep
Shared: Survival · Open World Survival Craft · Open World

Green Hell
Shared: Survival · Multiplayer · Open World Survival Craft

ASTRONEER
Shared: Multiplayer · Open World · Survival

Scrap Mechanic
Shared: Survival · Multiplayer · Open World

VEIN
Shared: Survival · Zombies · Open World

Satisfactory
Shared: Open World · Multiplayer · Crafting

Craftopia
Shared: Survival · Open World · Multiplayer

HumanitZ
Shared: Survival · Zombies · Open World

RuneScape: Dragonwilds
Shared: Survival · Open World · Multiplayer

Core Keeper
Shared: Survival · Open World · Multiplayer