Games like RIP
Games like RIP include Counter-Strike 2, PUBG: BATTLEGROUNDS, Arma 3, Aimlabs, and Tom Clancy's Rainbow Six Siege. We matched them by the tags players give RIP on Steam (Action, Simulation, War, Online Co-Op, and FPS): closest matches first, and among equally close ones the better-known games.

Counter-Strike 2
Shared: Action · FPS · Shooter

PUBG: BATTLEGROUNDS
Shared: Action · FPS · Battle Royale

Arma 3
Shared: Action · Simulation · Open World

Aimlabs
Shared: Simulation · Action · FPS

Tom Clancy's Rainbow Six Siege
Shared: FPS · Action · Online Co-Op

Insurgency: Sandstorm
Shared: FPS · Action · War

Ravenfield
Shared: War · FPS · Action

Call of Duty®
Shared: Action · FPS · War

Arma Reforger
Shared: Simulation · Action · FPS

KovaaK's
Shared: Action · Simulation · FPS

Gray Zone Warfare
Shared: FPS · Simulation · Action

WARDOGS
Shared: Action · FPS · Simulation

Insurgency
Shared: FPS · Action · War

Battlefield™ 6
Shared: FPS · Action · War

Homefront®: The Revolution
Shared: Action · FPS · Open World

Call of Duty®: Modern Warfare® 3 (2011)
Shared: Action · FPS · War

Squad
Shared: FPS · Action · War

Holdfast: Nations At War
Shared: War · Action · FPS

Far Cry 3
Shared: Action · FPS · Open World

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

How to Fish
Shared: Online Co-Op · Action · FPS

Call of Duty®: Modern Warfare® 2 (2009)
Shared: Action · FPS · War

Freeman: Guerrilla Warfare
Shared: Action · FPS · Open World

Call of Duty®: Black Ops 6
Shared: Action · FPS · War