Games like Containment Zone
Games like Containment Zone include Fallout 4, METRO 2033 Redux, Metro Exodus, S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition, and METRO Last Light Redux. We matched them by the tags players give Containment Zone on Steam (FPS, Simulation, Post-apocalyptic, Survival Horror, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Fallout 4
Shared: Post-apocalyptic · Atmospheric · FPS

METRO 2033 Redux
Shared: FPS · Post-apocalyptic · Atmospheric

Metro Exodus
Shared: FPS · Post-apocalyptic · Atmospheric

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Post-apocalyptic · Atmospheric

METRO Last Light Redux
Shared: FPS · Post-apocalyptic · Atmospheric

Fallout: New Vegas
Shared: Post-apocalyptic · FPS · Action

Gray Zone Warfare
Shared: FPS · Simulation · Realistic

Ready or Not
Shared: FPS · Realistic · Tactical

Escape from Tarkov
Shared: FPS · Survival Horror · Looter Shooter

BioShock Infinite
Shared: FPS · Action · Atmospheric

Insurgency: Sandstorm
Shared: FPS · Realistic · Action

WARDOGS
Shared: FPS · Action · Simulation

Half-Life 2
Shared: FPS · Action · Atmospheric

S.T.A.L.K.E.R.: Shadow of Chornobyl - Enhanced Edition
Shared: FPS · Action · Atmospheric

Arma 3
Shared: Simulation · Action · FPS

Counter-Strike 2
Shared: FPS · Action · Tactical

Resident Evil Requiem
Shared: Survival Horror · FPS · Action

Insurgency
Shared: FPS · Realistic · Tactical

Black Myth: Wukong
Shared: Action RPG · Action · Atmospheric

Cyberpunk 2077
Shared: FPS · Atmospheric · RPG

Squad
Shared: FPS · Realistic · Tactical

Call of Duty®
Shared: FPS · Action · Shooter

Arma Reforger
Shared: Simulation · FPS · Realistic

Aimlabs
Shared: FPS · Simulation · Action