Games like TerraTech Worlds
Games like TerraTech Worlds include Raft, ARK: Survival Evolved, Satisfactory, Valheim, and Terraria. We matched them by the tags players give TerraTech Worlds on Steam (Base Building, Open World Survival Craft, Sandbox, Crafting, and Survival): closest matches first, and among equally close ones the better-known games.

Raft
Shared: Open World Survival Craft · Survival · Crafting

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

Satisfactory
Shared: Base Building · Crafting · Open World

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

Terraria
Shared: Open World Survival Craft · Sandbox · Survival

Rust
Shared: Crafting · Open World Survival Craft · Survival

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

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

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

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

Sons Of The Forest
Shared: Base Building · Survival · Co-op

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

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

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

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

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

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

Scrap Mechanic
Shared: Sandbox · Survival · Base Building

The Planet Crafter
Shared: Base Building · Open World Survival Craft · Survival

Core Keeper
Shared: Survival · Open World · Sandbox

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

Factorio
Shared: Base Building · Sandbox · Crafting

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

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