Games like Hazordhu
Games like Hazordhu include Terraria, Rust, Core Keeper, Valheim, and Starbound. We matched them by the tags players give Hazordhu on Steam (Open World, Adventure, Building, Exploration, and Sandbox): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Sandbox · Adventure · Building

Rust
Shared: Open World · Building · Adventure

Core Keeper
Shared: Open World · Exploration · Sandbox

Valheim
Shared: Open World · Building · Exploration

Starbound
Shared: Adventure · Sandbox · Open World

Once Human
Shared: Open World · Building · Multiplayer

Necesse
Shared: Open World · Sandbox · Adventure

ARK: Survival Evolved
Shared: Open World · Building · Adventure

Conan Exiles Enhanced
Shared: Open World · Building · Sandbox

The Forest
Shared: Open World · Adventure · Building

Enshrouded
Shared: Open World · Adventure · Exploration

Crimson Desert Enhanced
Shared: Open World · Adventure · Exploration

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

7 Days to Die
Shared: Open World · Multiplayer · Building

TerraTech
Shared: Open World · Building · Sandbox

Palworld
Shared: Open World · Adventure · Multiplayer

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

No Man's Sky
Shared: Open World · Exploration · Adventure

The Elder Scrolls Online - Standard Edition
Shared: Open World · Adventure · Exploration

ARK: Survival Ascended
Shared: Open World · Building · Adventure

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

ASTRONEER
Shared: Open World · Exploration · Multiplayer

Medieval Dynasty
Shared: Building · Open World · Medieval

Monster Hunter: World
Shared: Open World · Adventure · Multiplayer