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

Rust
Shared: Survival · Open World Survival Craft · Multiplayer

Terraria
Shared: Open World Survival Craft · Survival · Multiplayer

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

Project Zomboid
Shared: Survival · Zombies · Open World Survival Craft

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

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

Palworld
Shared: Survival · Open World Survival Craft · Multiplayer

Raft
Shared: Survival · Open World Survival Craft · Multiplayer

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

DayZ
Shared: Survival · Zombies · Multiplayer

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

Valheim
Shared: Open World Survival Craft · Survival · Multiplayer

Left 4 Dead 2
Shared: Zombies · Multiplayer · Survival

Once Human
Shared: Survival · Multiplayer · Open World Survival Craft

Miscreated
Shared: Open World Survival Craft · Survival · Multiplayer

Grounded
Shared: Survival · Open World Survival Craft · Multiplayer

Dying Light
Shared: Zombies · Survival · Open World Survival Craft

SCUM
Shared: Open World Survival Craft · Survival · Zombies

Starbound
Shared: Open World Survival Craft · Survival · Sandbox

No Man's Sky
Shared: Open World Survival Craft · Survival · Open World

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

Deadside
Shared: Survival · Open World Survival Craft · Multiplayer

Hurtworld
Shared: Survival · Open World Survival Craft · Multiplayer

PUBG: BATTLEGROUNDS
Shared: Survival · Multiplayer · Action