Games like ChaosWorld
Games like ChaosWorld include ARK: Survival Evolved, Valheim, Rust, Myth of Empires, and Path of Exile 2. We matched them by the tags players give ChaosWorld on Steam (Souls-like, Medieval, Building, Open World Survival Craft, and Base Building): closest matches first, and among equally close ones the better-known games.

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

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

Rust
Shared: Open World Survival Craft · Building · Open World

Myth of Empires
Shared: Building · Open World Survival Craft · Base Building

Path of Exile 2
Shared: Action RPG · Souls-like · RPG

7 Days to Die
Shared: Open World Survival Craft · Base Building · Building

Terraria
Shared: Open World Survival Craft · Building · Sandbox

ELDEN RING
Shared: Souls-like · Action RPG · Open World

Where Winds Meet
Shared: Souls-like · Action RPG · Open World

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

Life is Feudal: Your Own
Shared: Medieval · Open World Survival Craft · Building

Medieval Dynasty
Shared: Building · Medieval · Base Building

Raft
Shared: Open World Survival Craft · Building · Base Building

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

Palworld
Shared: Open World Survival Craft · Open World · Base Building

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

Black Myth: Wukong
Shared: Souls-like · Action RPG · RPG

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

Black Desert
Shared: Medieval · Action RPG · Sandbox

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

Enshrouded
Shared: Base Building · Open World · Building

Satisfactory
Shared: Base Building · Building · Open World

Dune: Awakening
Shared: Open World Survival Craft · Base Building · Sandbox

Reign Of Kings
Shared: Open World Survival Craft · Medieval · Building