Games like MegaRats
Games like MegaRats include Grand Theft Auto V Legacy, BONEWORKS, Grand Theft Auto V Enhanced, Hard Bullet, and BONELAB. We matched them by the tags players give MegaRats on Steam (Action, Adventure, Indie, Simulation, and Open World): closest matches first, and among equally close ones the better-known games.

Grand Theft Auto V Legacy
Shared: Action · Open World · Adventure

BONEWORKS
Shared: Action · VR · Physics

Grand Theft Auto V Enhanced
Shared: Action · Open World · Adventure

Hard Bullet
Shared: Action · VR · Simulation

BONELAB
Shared: Action · VR · Shooter

Grand Theft Auto IV: The Complete Edition
Shared: Action · Open World · Adventure

Just Cause™ 3
Shared: Action · Open World · Adventure

Wobbly Life
Shared: Adventure · Open World · Simulation

Just Cause 2
Shared: Action · Open World · Adventure

Red Dead Redemption 2
Shared: Open World · Adventure · Action

Far Cry 3
Shared: Action · Adventure · Open World

Arma 3
Shared: Action · Simulation · Shooter

Goat Simulator
Shared: Simulation · Open World · Action

BeamNG.drive
Shared: Simulation · Physics · Open World

Dude Simulator
Shared: Adventure · Simulation · Indie

Hot Dogs, Horseshoes & Hand Grenades
Shared: Shooter · VR · Simulation

Flashing Lights - Police, Firefighting, Emergency Services (EMS) Simulator
Shared: Adventure · Simulation · Shooter

Rust
Shared: Open World · Adventure · Action

Just Cause 4 Reloaded
Shared: Action · Open World · Adventure

Aimlabs
Shared: Action · Simulation · Shooter

Thief Simulator
Shared: Simulation · Adventure · Open World

Fallout 4
Shared: Open World · Adventure · Action

X-Plane 11
Shared: Simulation · Open World · VR

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Indie