Games like Barbarian
Games like Barbarian include Valheim, Rust, Don't Starve Together, Terraria, and ARK: Survival Evolved. We matched them by the tags players give Barbarian on Steam (Fantasy, Crafting, Survival, Adventure, and Combat): closest matches first, and among equally close ones the better-known games.

Valheim
Shared: Survival · Crafting · Open World Survival Craft

Rust
Shared: Crafting · Survival · Multiplayer

Don't Starve Together
Shared: Survival · Crafting · Adventure

Terraria
Shared: Survival · Open World Survival Craft · Crafting

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

Palworld
Shared: Survival · Crafting · Open World

Enshrouded
Shared: Survival · Crafting · Open World

Don't Starve
Shared: Survival · Crafting · Adventure

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

Raft
Shared: Survival · Crafting · Multiplayer

Once Human
Shared: Survival · Multiplayer · Open World

Grounded
Shared: Survival · Crafting · Multiplayer

Monster Hunter: World
Shared: Multiplayer · Fantasy · Adventure

ARK: Survival Ascended
Shared: Survival · Crafting · Multiplayer

Green Hell
Shared: Survival · Crafting · Multiplayer

ELDEN RING
Shared: Souls-like · Fantasy · Open World

Conan Exiles Enhanced
Shared: Survival · Crafting · Open World

Subnautica
Shared: Survival · Crafting · Open World Survival Craft

RuneScape: Dragonwilds
Shared: Survival · Crafting · Multiplayer

Dune: Awakening
Shared: Survival · Open World Survival Craft · Adventure

Crimson Desert Enhanced
Shared: Fantasy · Adventure · Combat

Grounded 2
Shared: Survival · Adventure · Multiplayer

Starbound
Shared: Survival · Crafting · Adventure

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