Games like 3d Engineers
Games like 3d Engineers include Garry's Mod, Kerbal Space Program, People Playground, Besiege, and Space Engineers. We matched them by the tags players give 3d Engineers on Steam (Simulation, Building, Physics, Crafting, and Sandbox): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Physics · Building

Kerbal Space Program
Shared: Simulation · Physics · Sandbox

People Playground
Shared: Physics · Sandbox · Simulation

Besiege
Shared: Simulation · Physics · Sandbox

Space Engineers
Shared: Building · Simulation · Sandbox

Scrap Mechanic
Shared: Building · Sandbox · Physics

Poly Bridge
Shared: Building · Simulation · Physics

Automation - The Car Company Tycoon Game
Shared: Simulation · Building · Sandbox

Poly Bridge 2
Shared: Building · Physics · Simulation

BeamNG.drive
Shared: Simulation · Physics · Sandbox

Cities: Skylines
Shared: Simulation · Building · Sandbox

Aviassembly
Shared: Building · Physics · Sandbox

Car Mechanic Simulator 2018
Shared: Simulation · Building · Sandbox

Graveyard Keeper
Shared: Simulation · Crafting · Sandbox

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics

Medieval Engineers
Shared: Building · Physics · Sandbox

Stardew Valley
Shared: Simulation · Sandbox · Crafting

CarX Drift Racing Online
Shared: Simulation · Sandbox · Moddable

From the Depths
Shared: Building · Sandbox · Physics

Cities: Skylines II
Shared: Simulation · Building · Sandbox

Prison Architect
Shared: Simulation · Building · Sandbox

MineMogul
Shared: Building · Physics · Simulation

Kerbal Space Program 2
Shared: Building · Sandbox · Physics

Brick Rigs
Shared: Building · Sandbox · Physics