Games like Undeadz!
Games like Undeadz! include Project Zomboid, SCUM, 7 Days to Die, DayZ, and Days Gone. We matched them by the tags players give Undeadz! on Steam (Indie, Action, Zombies, Open World, and Retro): closest matches first, and among equally close ones the better-known games.

Project Zomboid
Shared: Zombies · Open World · Survival

SCUM
Shared: Open World · Zombies · Survival

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

DayZ
Shared: Zombies · Open World · Survival

Days Gone
Shared: Zombies · Open World · Survival

Dying Light
Shared: Zombies · Open World · Survival

DYSMANTLE
Shared: Open World · Zombies · Survival

Palworld
Shared: Open World · Survival · Indie

CastleMiner Z
Shared: Zombies · Action · Survival

Rust
Shared: Survival · Open World · Action

The Forest
Shared: Open World · Survival · Action

Miscreated
Shared: Open World · Zombies · Survival

ARK: Survival Ascended
Shared: Open World · Survival · Action

Last Oasis
Shared: Open World · Action · Survival

SurrounDead
Shared: Zombies · Open World · Survival

Mist Survival
Shared: Zombies · Survival · Open World

Green Hell
Shared: Survival · Open World · Action

Dead Pixels
Shared: Action · Zombies · Indie

Left 4 Dead 2
Shared: Zombies · Action · Survival

We Happy Few
Shared: Action · Open World · Indie

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

Once Human
Shared: Open World · Action · Survival

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

ZED ZONE
Shared: Zombies · Open World · Survival