Games like Trainz Plus
Games like Trainz Plus include BeamNG.drive, Train Simulator Classic, Euro Truck Simulator 2, Trainz Railroad Simulator 2022, and American Truck Simulator. We matched them by the tags players give Trainz Plus on Steam (Simulation, Trains, Sandbox, Realistic, and 3D): closest matches first, and among equally close ones the better-known games.

BeamNG.drive
Shared: Simulation · Realistic · Sandbox

Train Simulator Classic
Shared: Simulation · Trains · Realistic

Euro Truck Simulator 2
Shared: Simulation · Realistic · Driving

Trainz Railroad Simulator 2022
Shared: Simulation · Trains · Level Editor

American Truck Simulator
Shared: Simulation · Realistic · Driving

Car Mechanic Simulator 2018
Shared: Simulation · Realistic · Building

CarX Drift Racing Online
Shared: Simulation · Sandbox · Multiplayer

Garry's Mod
Shared: Sandbox · Building · Simulation

SnowRunner
Shared: Simulation · Realistic · Sandbox

My Summer Car
Shared: Simulation · Realistic · Driving

Emergency Call 112 – The Fire Fighting Simulation 2
Shared: Simulation · Realistic · Sandbox

Derail Valley
Shared: Simulation · Trains · Realistic

Car Mechanic Simulator 2021
Shared: Simulation · Sandbox · Realistic

Transport Fever 2
Shared: Simulation · Trains · Sandbox

Farming Simulator 25
Shared: Simulation · Realistic · 3D

Construction Simulator
Shared: Simulation · Building · Realistic

Rolling Line
Shared: Simulation · Trains · Level Editor

Space Engineers
Shared: Sandbox · Simulation · Building

Cities: Skylines II
Shared: Simulation · Sandbox · Building

Train Sim World® 2020
Shared: Simulation · Trains · Realistic

Besiege
Shared: Simulation · Sandbox · Building

Planet Coaster
Shared: Simulation · Sandbox · Building

Brick Rigs
Shared: Sandbox · Simulation · Building

MudRunner
Shared: Simulation · Realistic · Multiplayer