Games like Autocraft
Games like Autocraft include Garry's Mod, Space Engineers, Kerbal Space Program, Scrap Mechanic, and Stardew Valley. We matched them by the tags players give Autocraft on Steam (Sandbox, Simulation, Building, Indie, and Physics): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Building · Physics

Space Engineers
Shared: Sandbox · Building · Simulation

Kerbal Space Program
Shared: Simulation · Sandbox · Space

Scrap Mechanic
Shared: Sandbox · Building · Physics

Stardew Valley
Shared: Simulation · Sandbox · Multiplayer

Empyrion - Galactic Survival
Shared: Simulation · Building · Space

Kerbal Space Program 2
Shared: Sandbox · Building · Space

People Playground
Shared: Sandbox · Physics · Simulation

Spaceflight Simulator
Shared: Sandbox · Simulation · Space

Brick Rigs
Shared: Sandbox · Building · Physics

House Flipper
Shared: Simulation · Building · Sandbox

Universe Sandbox
Shared: Sandbox · Simulation · Physics

Project Zomboid
Shared: Sandbox · Building · Multiplayer

Poly Bridge
Shared: Building · Simulation · Physics

BeamNG.drive
Shared: Simulation · Physics · Sandbox

Goat Simulator
Shared: Simulation · Sandbox · Physics

Besiege
Shared: Sandbox · Simulation · Physics

Medieval Engineers
Shared: Sandbox · Building · Physics

Rust
Shared: Building · Sandbox · Crafting

Terraria
Shared: Sandbox · Building · Multiplayer

Paralives
Shared: Simulation · Building · Indie

Medieval Dynasty
Shared: Building · Crafting · Sandbox

Raft
Shared: Building · Multiplayer · Crafting

Wobbly Life
Shared: Sandbox · Simulation · Multiplayer