Games like Iron Storm
Games like Iron Storm include Half-Life 2, BioShock Infinite, Counter-Strike 2, Black Mesa, and Aimlabs. We matched them by the tags players give Iron Storm on Steam (Action, Adventure, Indie, FPS, and Alternate History): closest matches first, and among equally close ones the better-known games.

Half-Life 2
Shared: Action · FPS · Adventure

BioShock Infinite
Shared: Action · FPS · Shooter

Counter-Strike 2
Shared: FPS · Action · Shooter

Black Mesa
Shared: Action · FPS · First-Person

Aimlabs
Shared: FPS · Action · Shooter

Far Cry 3
Shared: Action · Adventure · FPS

Counter-Strike
Shared: Action · FPS · Shooter

PUBG: BATTLEGROUNDS
Shared: FPS · Shooter · Action

Wolfenstein: The New Order
Shared: Action · FPS · Alternate History

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

Apex Legends™
Shared: FPS · Action · Shooter

Battlefield™ 1
Shared: FPS · Action · World War I

KovaaK's
Shared: Action · FPS · Indie

Ready or Not
Shared: FPS · Shooter · Action

Far Cry® 4
Shared: Action · FPS · Adventure

Counter-Strike: Condition Zero
Shared: Action · FPS · Shooter

Atomic Heart
Shared: Adventure · Action · FPS

VLADiK BRUTAL
Shared: Action · FPS · Adventure

Wolfenstein II: The New Colossus
Shared: Action · FPS · Alternate History

Serious Sam II
Shared: Action · FPS · Shooter

Half-Life
Shared: FPS · Action · Classic

Bright Memory
Shared: FPS · Action · Shooter

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

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