Games like Fogline protocol
Games like Fogline protocol include Left 4 Dead 2, PUBG: BATTLEGROUNDS, Call of Duty®, Call of Duty®: Black Ops III, and Ravenfield. We matched them by the tags players give Fogline protocol on Steam (Action, Strategy, Shooter, FPS, and Stylized): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: FPS · Zombies · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · FPS · Action

Call of Duty®
Shared: FPS · Shooter · Action

Call of Duty®: Black Ops III
Shared: Action · Shooter · FPS

Ravenfield
Shared: FPS · Shooter · Action

Freeman: Guerrilla Warfare
Shared: Action · Strategy · Shooter

Half-Life 2
Shared: Action · FPS · Shooter

Back 4 Blood
Shared: Zombies · FPS · Shooter

Black Mesa
Shared: Action · FPS · Shooter

Delta Force
Shared: FPS · Shooter · Action

Counter-Strike: Source
Shared: Action · Shooter · FPS

Pavlov
Shared: Shooter · Action · FPS

Bright Memory: Infinite
Shared: Action · FPS · Shooter

DOOM
Shared: Action · FPS · Shooter

Ready or Not
Shared: Shooter · FPS · Action

Call of Duty: World at War
Shared: Action · FPS · Zombies

Call of Duty®: Black Ops
Shared: Action · FPS · Shooter

Call of Duty®: Black Ops Cold War
Shared: Action · FPS · Zombies

DOOM Eternal
Shared: Action · FPS · Shooter

KovaaK's
Shared: Action · Shooter · FPS

Battlefield™ 6
Shared: FPS · Action · Shooter

Call of Duty®: WWII
Shared: FPS · Action · Zombies

OPERATOR
Shared: Shooter · Action · FPS

HELLDIVERS™ 2
Shared: Action · Shooter · PvE