Games like Sumo Stuntmen 7
Games like Sumo Stuntmen 7 include BeamNG.drive, CarX Drift Racing Online, Wreckfest, Prison Escape Simulator: Dig Out, and Garry's Mod. We matched them by the tags players give Sumo Stuntmen 7 on Steam (Action, Simulation, Physics, Comic Book, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

BeamNG.drive
Shared: Simulation · Physics · Driving

CarX Drift Racing Online
Shared: Simulation · Physics · Multiplayer

Wreckfest
Shared: Simulation · Action · Physics

Prison Escape Simulator: Dig Out
Shared: Simulation · Physics · 3D

Garry's Mod
Shared: Physics · Multiplayer · Simulation

Firefighting Simulator - The Squad
Shared: Simulation · Action · Multiplayer

Gang Beasts
Shared: Action · Physics · Multiplayer

Warhammer 40,000: Space Marine 2
Shared: Action · Multiplayer · Action-Adventure

Instruments of Destruction
Shared: Action · Physics · Simulation

PEAK
Shared: Physics · Multiplayer · 3D

Teardown
Shared: Physics · Multiplayer · Singleplayer

Totally Accurate Battle Simulator
Shared: Simulation · Physics · Singleplayer

Assetto Corsa
Shared: Simulation · Multiplayer · Driving

Fun with Ragdolls: The Game
Shared: Physics · Simulation · Action

Arma 3
Shared: Action · Simulation · Multiplayer

Buckshot Roulette
Shared: Dark · Multiplayer · 3D

Fireworks Mania - An Explosive Simulator
Shared: Physics · Multiplayer · Action

Goat Simulator 3
Shared: Physics · Simulation · 3D

Trailmakers
Shared: Action · Action-Adventure · Singleplayer

R.E.P.O.
Shared: Physics · Multiplayer · 3D

Firefighting Simulator: Ignite
Shared: Action · Simulation · 3D

Brick Rigs
Shared: Physics · Simulation · Multiplayer

Goat Simulator
Shared: Simulation · Physics · Action

Marvel's Spider-Man 2
Shared: Action · Action-Adventure · Comic Book