Games like LEGO® Worlds
Games like LEGO® Worlds include Just Cause™ 3, Scrap Mechanic, Grand Theft Auto V Legacy, Just Cause 2, and Brick Rigs. We matched them by the tags players give LEGO® Worlds on Steam (Open World, Building, Sandbox, Multiplayer, and Adventure): closest matches first, and among equally close ones the better-known games.

Just Cause™ 3
Shared: Open World · Multiplayer · Sandbox

Scrap Mechanic
Shared: Building · Sandbox · Open World

Grand Theft Auto V Legacy
Shared: Open World · Multiplayer · Adventure

Just Cause 2
Shared: Open World · Sandbox · Multiplayer

Brick Rigs
Shared: Sandbox · Building · Open World

Terraria
Shared: Sandbox · Multiplayer · Building

Garry's Mod
Shared: Sandbox · Multiplayer · Building

Rust
Shared: Open World · Multiplayer · Building

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

Valheim
Shared: Open World · Building · Multiplayer

Once Human
Shared: Open World · Multiplayer · Building

Wobbly Life
Shared: Open World · Multiplayer · Adventure

ASTRONEER
Shared: Open World · Multiplayer · Exploration

Raft
Shared: Multiplayer · Open World · Building

TerraTech
Shared: Building · Open World · Sandbox

Satisfactory
Shared: Open World · Multiplayer · Building

Sons Of The Forest
Shared: Open World · Multiplayer · Building

Slime Rancher
Shared: Open World · Adventure · Exploration

Core Keeper
Shared: Open World · Multiplayer · Sandbox

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

Red Dead Redemption 2
Shared: Open World · Multiplayer · Adventure

The Forest
Shared: Open World · Building · Adventure

Grand Theft Auto IV: The Complete Edition
Shared: Open World · Multiplayer · Adventure

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