Games like Drive 21
Games like Drive 21 include Euro Truck Simulator 2, BeamNG.drive, American Truck Simulator, Forza Horizon 5, and My Summer Car. We matched them by the tags players give Drive 21 on Steam (Simulation, Open World, Automobile Sim, Immersive Sim, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Euro Truck Simulator 2
Shared: Simulation · Open World · Automobile Sim

BeamNG.drive
Shared: Simulation · Automobile Sim · Driving

American Truck Simulator
Shared: Automobile Sim · Open World · Simulation

Forza Horizon 5
Shared: Open World · Automobile Sim · Simulation

My Summer Car
Shared: Simulation · Automobile Sim · Open World

Car For Sale Simulator
Shared: Simulation · Immersive Sim · Multiplayer

SnowRunner
Shared: Simulation · Automobile Sim · Multiplayer

Assetto Corsa
Shared: Simulation · Automobile Sim · Multiplayer

City Car Driving
Shared: Simulation · Automobile Sim · Open World

Forza Horizon 6
Shared: Open World · Simulation · Automobile Sim

Bus Simulator 21 Next Stop
Shared: Simulation · Automobile Sim · 3D

Car Mechanic Simulator 2018
Shared: Simulation · Automobile Sim · Multiplayer

Grand Theft Auto V Legacy
Shared: Open World · Automobile Sim · Multiplayer

Euro Truck Simulator
Shared: Simulation · Automobile Sim · Open World

Car Mechanic Simulator 2021
Shared: Simulation · Automobile Sim · Realistic

Farming Simulator 19
Shared: Simulation · Multiplayer · Open World

The Long Drive
Shared: Open World · Multiplayer · Automobile Sim

Motor Town: Behind The Wheel
Shared: Open World · Simulation · Automobile Sim

MudRunner
Shared: Simulation · Automobile Sim · Multiplayer

Car Dealer Simulator
Shared: Simulation · Automobile Sim · Driving

Bus Simulator 18
Shared: Simulation · Automobile Sim · Open World

Farming Simulator 17
Shared: Simulation · Automobile Sim · Multiplayer

My Winter Car
Shared: Simulation · Automobile Sim · Open World

Police Simulator: Patrol Officers
Shared: Simulation · Open World · Multiplayer