Games like Purgatory Overkill
Games like Purgatory Overkill include Half-Life: Alyx, Bodycam, Ready or Not, Deep Rock Galactic, and DOOM. We matched them by the tags players give Purgatory Overkill on Steam (Exploration, FPS, Tower Defense, Shooter, and 3D): closest matches first, and among equally close ones the better-known games.

Half-Life: Alyx
Shared: FPS · VR · Shooter

Bodycam
Shared: FPS · Shooter · Horror

Ready or Not
Shared: FPS · Shooter · Realistic

Deep Rock Galactic
Shared: FPS · Exploration · Shooter

DOOM
Shared: FPS · Shooter · Action

Far Cry® 5
Shared: FPS · Exploration · Shooter

Left 4 Dead 2
Shared: FPS · Shooter · Horror

Project Silverfish
Shared: FPS · Exploration · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · FPS · Action

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

Outpost: Infinity Siege
Shared: Tower Defense · FPS · 3D

Into the Radius VR
Shared: FPS · VR · Horror

Half-Life 2
Shared: FPS · Shooter · Action

Black Mesa
Shared: FPS · Shooter · Action

Witchfire
Shared: FPS · Shooter · Exploration

DOOM 3
Shared: FPS · Shooter · Horror

Echo Point Nova
Shared: FPS · Exploration · Shooter

Metro Exodus
Shared: FPS · Horror · Shooter

BioShock Infinite
Shared: FPS · Shooter · Action

Call of Duty®
Shared: FPS · Shooter · Action

The Callisto Protocol™
Shared: Horror · Shooter · Sci-fi

Aliens: Colonial Marines Collection
Shared: FPS · Shooter · Action

Insurgency: Sandstorm
Shared: FPS · Shooter · Realistic

Aliens vs. Predator™
Shared: FPS · Action · Horror