Games like Underlings
Games like Underlings include Terraria, Don't Starve Together, Valheim, Palworld, and Rust. We matched them by the tags players give Underlings on Steam (Open World Survival Craft, Survival, Sandbox, Crafting, and Open World): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Open World Survival Craft · Survival · Sandbox

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

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

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

Rust
Shared: Survival · Crafting · Open World Survival Craft

Core Keeper
Shared: Survival · Open World · Sandbox

Raft
Shared: Survival · Open World Survival Craft · Crafting

Starbound
Shared: Open World Survival Craft · Survival · Sandbox

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

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

Forager
Shared: Open World Survival Craft · Survival · Crafting

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

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

Necesse
Shared: Open World Survival Craft · Sandbox · Survival

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

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

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

Grounded
Shared: Survival · Open World Survival Craft · Crafting

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

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

The Long Dark
Shared: Open World Survival Craft · Survival · Open World

Subnautica
Shared: Open World Survival Craft · Survival · Open World

ICARUS
Shared: Open World Survival Craft · Survival · Crafting

ASTRONEER
Shared: Open World Survival Craft · Survival · Open World