Games like BROKE PROTOCOL
Games like BROKE PROTOCOL include Garry's Mod, Rust, Grand Theft Auto V Legacy, Far Cry 3, and Arma 3. We matched them by the tags players give BROKE PROTOCOL on Steam (Sandbox, Open World, Multiplayer, FPS, and Moddable): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Multiplayer · Moddable

Rust
Shared: Multiplayer · Open World · Sandbox

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

Far Cry 3
Shared: Open World · FPS · Multiplayer

Arma 3
Shared: Multiplayer · Open World · Shooter

Counter-Strike 2
Shared: FPS · Multiplayer · Shooter

DayZ
Shared: Open World · Multiplayer · Sandbox

Grand Theft Auto V Enhanced
Shared: Open World · Multiplayer · Shooter

Mount & Blade: Warband
Shared: Open World · Sandbox · Multiplayer

Mount & Blade II: Bannerlord
Shared: Open World · Sandbox · Multiplayer

PUBG: BATTLEGROUNDS
Shared: Multiplayer · FPS · Shooter

Far Cry® 4
Shared: Open World · FPS · Multiplayer

POSTAL 2
Shared: Open World · Sandbox · Moddable

Destiny 2
Shared: Open World · Multiplayer · FPS

Far Cry® 2
Shared: Open World · FPS · Multiplayer

Once Human
Shared: Open World · Multiplayer · Action

Just Cause 2
Shared: Open World · Sandbox · Multiplayer

Halo Infinite
Shared: Multiplayer · FPS · Open World

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

Wobbly Life
Shared: Open World · Multiplayer · Sandbox

Far Cry® 5
Shared: Open World · Multiplayer · FPS

Red Dead Redemption 2
Shared: Open World · Multiplayer · Shooter

Far Cry® 6
Shared: Open World · Multiplayer · FPS

Borderlands 2
Shared: Multiplayer · Shooter · FPS

