Games like Scrap Mechanic
Games like Scrap Mechanic include Rust, Raft, ARK: Survival Evolved, Sons Of The Forest, and Terraria. We matched them by the tags players give Scrap Mechanic on Steam (Building, Sandbox, Survival, Multiplayer, and Open World): closest matches first, and among equally close ones the better-known games.

Rust
Shared: Survival · Multiplayer · Building

Raft
Shared: Survival · Multiplayer · Building

ARK: Survival Evolved
Shared: Survival · Multiplayer · Building

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

Terraria
Shared: Sandbox · Survival · Multiplayer

ARK: Survival Ascended
Shared: Survival · Multiplayer · Open World

Space Engineers
Shared: Building · Sandbox · Survival

Valheim
Shared: Survival · Building · Multiplayer

Satisfactory
Shared: Open World · Building · Multiplayer

Once Human
Shared: Open World · Survival · Multiplayer

Garry's Mod
Shared: Sandbox · Building · Multiplayer

Palworld
Shared: Survival · Open World · Multiplayer

Medieval Dynasty
Shared: Building · Multiplayer · Survival

Project Zomboid
Shared: Survival · Multiplayer · Open World

The Forest
Shared: Survival · Building · Open World

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

Enshrouded
Shared: Survival · Open World · Multiplayer

Core Keeper
Shared: Survival · Open World · Sandbox

ASTRONEER
Shared: Multiplayer · Survival · Open World

Green Hell
Shared: Survival · Multiplayer · Open World

Subsistence
Shared: Survival · Multiplayer · Building

Grounded
Shared: Survival · Multiplayer · Open World

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

Conan Exiles Enhanced
Shared: Survival · Building · Open World