Games like Goat Massacre
Games like Goat Massacre include DOOM, DOOM Eternal, BioShock Infinite, S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition, and Black Mesa. We matched them by the tags players give Goat Massacre on Steam (Action, Shooter, FPS, First-Person, and Sci-fi): closest matches first, and among equally close ones the better-known games.

DOOM
Shared: Action · FPS · Shooter

DOOM Eternal
Shared: Action · FPS · Shooter

BioShock Infinite
Shared: Action · Shooter · FPS

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Shooter · Survival

Black Mesa
Shared: Action · FPS · First-Person

Half-Life 2
Shared: Action · FPS · Sci-fi

PUBG: BATTLEGROUNDS
Shared: Shooter · Survival · FPS

DOOM: The Dark Ages
Shared: Action · FPS · Demons

Halo Infinite
Shared: FPS · Shooter · Action

Call of Duty®
Shared: FPS · Shooter · Action

Far Cry 3
Shared: Action · FPS · Shooter

Far Cry® 2
Shared: Action · FPS · Shooter

Ready or Not
Shared: FPS · Shooter · Realistic

Far Cry® 4
Shared: Action · FPS · Shooter

Metro Exodus
Shared: FPS · Action · First-Person

Apex Legends™
Shared: FPS · Shooter · Action

Left 4 Dead 2
Shared: FPS · Shooter · Action

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

Insurgency: Sandstorm
Shared: FPS · Shooter · Action

Fallout 4
Shared: Shooter · Open World · First-Person

RoboCop: Rogue City
Shared: Action · FPS · First-Person

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

Bright Memory
Shared: FPS · Shooter · Action

Arma 3
Shared: Action · Shooter · First-Person