Games like Back 4 Blood
Games like Back 4 Blood include Left 4 Dead 2, Killing Floor 2, Killing Floor, Dying Light, and Left 4 Dead. We matched them by the tags players give Back 4 Blood on Steam (Zombies, Online Co-Op, Multiplayer, FPS, and Gore): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: Zombies · Multiplayer · FPS

Killing Floor 2
Shared: Zombies · Multiplayer · Online Co-Op

Killing Floor
Shared: Zombies · FPS · Multiplayer

Dying Light
Shared: Zombies · Online Co-Op · Horror

Left 4 Dead
Shared: Zombies · Multiplayer · FPS

PUBG: BATTLEGROUNDS
Shared: Multiplayer · Shooter · FPS

Call of Duty®: Black Ops III
Shared: Zombies · Multiplayer · FPS

DayZ
Shared: Zombies · Online Co-Op · Multiplayer

Dead by Daylight
Shared: Multiplayer · Online Co-Op · Gore

World War Z
Shared: Zombies · Online Co-Op · Multiplayer

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

Call of Duty®
Shared: Multiplayer · FPS · Shooter

GTFO
Shared: Online Co-Op · FPS · Multiplayer

Blood and Bacon
Shared: Multiplayer · Gore · FPS

No More Room in Hell 2
Shared: Zombies · Online Co-Op · Multiplayer

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

Ready or Not
Shared: FPS · Multiplayer · Shooter

Call of Duty®: Black Ops
Shared: Zombies · FPS · Multiplayer

DOOM
Shared: FPS · Gore · Shooter

PAYDAY 2
Shared: FPS · Multiplayer · Co-op

HELLDIVERS™ 2
Shared: Online Co-Op · Multiplayer · Shooter

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

Delta Force
Shared: Multiplayer · FPS · Online Co-Op

Pavlov
Shared: Multiplayer · Shooter · Zombies