Games like ROOT
Games like ROOT include Black Mesa, Deus Ex: Mankind Divided, Crysis 2 - Maximum Edition, Deus Ex: Human Revolution - Director’s Cut, and DOOM. We matched them by the tags players give ROOT on Steam (Action, Indie, Stealth, FPS, and Shooter): closest matches first, and among equally close ones the better-known games.

Black Mesa
Shared: Action · FPS · First-Person

Deus Ex: Mankind Divided
Shared: Stealth · Action · Cyberpunk

Crysis 2 - Maximum Edition
Shared: Action · FPS · Shooter

Deus Ex: Human Revolution - Director’s Cut
Shared: Stealth · Action · Cyberpunk

DOOM
Shared: Action · FPS · Shooter

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

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

PAYDAY 2
Shared: Action · FPS · Stealth

Titanfall® 2
Shared: FPS · Action · Shooter

Crysis Remastered
Shared: Action · FPS · Stealth

Bright Memory: Infinite
Shared: Action · Indie · FPS

Cyberpunk 2077
Shared: Cyberpunk · FPS · Sci-fi

DOOM Eternal
Shared: Action · FPS · Shooter

SUPERHOT
Shared: Action · FPS · Indie

Apex Legends™
Shared: FPS · Action · Shooter

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

Hard Reset Extended Edition
Shared: Action · FPS · Indie

Halo: The Master Chief Collection
Shared: FPS · Great Soundtrack · Action

Far Cry 3 - Blood Dragon
Shared: Action · FPS · Cyberpunk

BioShock Infinite
Shared: Action · Shooter · FPS

KovaaK's
Shared: Action · Indie · Shooter

Far Cry 3
Shared: Action · FPS · Stealth

Marathon
Shared: FPS · Action · Shooter

Aimlabs
Shared: FPS · Action · Shooter