Games like Outbreak Horizon
Games like Outbreak Horizon include Counter-Strike 2, Left 4 Dead 2, PUBG: BATTLEGROUNDS, Ready or Not, and Squad. We matched them by the tags players give Outbreak Horizon on Steam (Action, Adventure, Shooter, FPS, and Tactical RPG): closest matches first, and among equally close ones the better-known games.
Counter-Strike 2
Shared: Shooter · FPS · Action
Left 4 Dead 2
Shared: FPS · Shooter · Action
PUBG: BATTLEGROUNDS
Shared: Shooter · FPS · Action
Ready or Not
Shared: Shooter · FPS · Realistic
Squad
Shared: FPS · Realistic · Shooter
Call of Duty®
Shared: FPS · Shooter · Action
Call of Duty®: Black Ops III
Shared: Action · Shooter · FPS
Apex Legends™
Shared: FPS · Shooter · Action
Tom Clancy's Rainbow Six Siege
Shared: FPS · Shooter · Action
Insurgency: Sandstorm
Shared: FPS · Shooter · Action
Far Cry 3
Shared: Action · Adventure · FPS
Back 4 Blood
Shared: FPS · Shooter · Action
Arma 3
Shared: Action · Shooter · First-Person
Insurgency
Shared: FPS · Action · Shooter
Grand Theft Auto V Legacy
Shared: Action · Shooter · Adventure
Black Mesa
Shared: Action · FPS · Shooter
Aimlabs
Shared: FPS · Shooter · Action
Call of Duty®: Black Ops 6
Shared: Action · Shooter · FPS
Far Cry® 4
Shared: Action · FPS · Adventure
Bodycam
Shared: FPS · Shooter · Realistic
Half-Life 2
Shared: Action · FPS · Shooter
Halo Infinite
Shared: FPS · Action · Shooter
Battlefield™ 2042
Shared: FPS · Shooter · Action
Red Dead Redemption 2
Shared: Adventure · Action · Shooter