Games like Intravenous 3: Borderline
Games like Intravenous 3: Borderline include Intravenous 2, Ready or Not, Arma 3, Police Stories, and Hitman: Absolution. We matched them by the tags players give Intravenous 3: Borderline on Steam (Action, Violent, Tactical, Stealth, and Strategy): closest matches first, and among equally close ones the better-known games.

Intravenous 2
Shared: Tactical · Stealth · Shooter

Ready or Not
Shared: Tactical · Shooter · Realistic

Arma 3
Shared: Action · Shooter · Simulation

Police Stories
Shared: Action · Tactical · Strategy

Hitman: Absolution
Shared: Action · Stealth · Tactical

Call of Duty®
Shared: Action · Shooter · Tactical

Hell Let Loose
Shared: Shooter · Action · Realistic

OPERATOR
Shared: Action · Tactical · Shooter

Tom Clancy's Ghost Recon® Wildlands
Shared: Shooter · Action · Stealth

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · Tactical

Hell Let Loose: Vietnam
Shared: Action · Strategy · Simulation

HITMAN World of Assassination
Shared: Stealth · Action · Violent

Shadow Tactics: Blades of the Shogun
Shared: Stealth · Tactical · Strategy

Zero Hour
Shared: Tactical · Action · Shooter

GROUND BRANCH
Shared: Tactical · Action · Shooter

Tom Clancy's Ghost Recon® Breakpoint
Shared: Shooter · Action · Stealth

Tom Clancy’s Splinter Cell Blacklist
Shared: Action · Stealth · Tactical

Arma Reforger
Shared: Action · Shooter · Simulation

Arma 2: Operation Arrowhead
Shared: Action · Tactical · Simulation

Insurgency: Sandstorm
Shared: Tactical · Action · Shooter

Insurgency
Shared: Tactical · Action · Shooter

Door Kickers
Shared: Tactical · Action · Strategy

Sniper Elite 4
Shared: Action · Stealth · Shooter