Games like Hollow 2
Games like Hollow 2 include Black Mesa, Half-Life 2, Ready or Not, BioShock Infinite, and DOOM Eternal. We matched them by the tags players give Hollow 2 on Steam (Action, Adventure, Indie, Violent, and Nudity): closest matches first, and among equally close ones the better-known games.

Black Mesa
Shared: Action · FPS · First-Person

Half-Life 2
Shared: Action · FPS · Adventure

Ready or Not
Shared: FPS · Shooter · Action

BioShock Infinite
Shared: Action · FPS · First-Person

DOOM Eternal
Shared: Action · FPS · Violent

METRO Last Light Redux
Shared: Action · FPS · Horror

Wolfenstein II: The New Colossus
Shared: Action · FPS · Violent

Space Hulk: Deathwing - Enhanced Edition
Shared: Action · FPS · Adventure

Trepang2
Shared: Action · FPS · Violent

DOOM
Shared: Action · FPS · Shooter

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

Half-Life: Alyx
Shared: FPS · Action · Horror

Metro Exodus
Shared: FPS · Action · Adventure

Half-Life: Opposing Force
Shared: Action · FPS · Adventure

Far Cry 3
Shared: Action · Adventure · FPS

Call of Duty®
Shared: Action · FPS · Shooter

Cyberpunk 2077
Shared: Nudity · FPS · Action

METRO 2033 Redux
Shared: Action · FPS · Horror

Bright Memory: Infinite
Shared: Action · Indie · FPS

Bulletstorm: Full Clip Edition
Shared: Action · Adventure · Violent

Outlast
Shared: First-Person · Horror · Adventure

Half-Life: Blue Shift
Shared: Action · FPS · Adventure

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

Atomic Heart
Shared: Adventure · Action · FPS