Games like Block Fortress 2
Games like Block Fortress 2 include Aimlabs, PUBG: BATTLEGROUNDS, Ravenfield, Grand Theft Auto V Legacy, and Call of Duty®. We matched them by the tags players give Block Fortress 2 on Steam (Action, Base Building, FPS, Third-Person Shooter, and Sandbox): closest matches first, and among equally close ones the better-known games.

Aimlabs
Shared: FPS · Action · Shooter

PUBG: BATTLEGROUNDS
Shared: FPS · Action · Shooter

Ravenfield
Shared: FPS · Action · War

Grand Theft Auto V Legacy
Shared: Action · Third-Person Shooter · Shooter

Call of Duty®
Shared: FPS · Action · Shooter

Arma 3
Shared: Action · Shooter · FPS

Arma Reforger
Shared: Action · FPS · Shooter

Warhammer 40,000: Space Marine 2
Shared: Action · Third-Person Shooter · PvE

Freeman: Guerrilla Warfare
Shared: Action · FPS · Shooter

Call of Duty®: Modern Warfare® II
Shared: Action · FPS · Third-Person Shooter

BioShock Infinite
Shared: Action · FPS · Shooter

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Third-Person Shooter · FPS

s&box
Shared: Action · Sandbox · FPS

Battlefield™ 2042
Shared: FPS · Action · Shooter

Mount & Blade II: Bannerlord
Shared: Action · Sandbox · War

Counter-Strike: Source
Shared: Action · FPS · Shooter

Half-Life 2
Shared: Action · FPS · Shooter

HELLDIVERS™ 2
Shared: Third-Person Shooter · Action · Shooter

STAR WARS™ Battlefront™ II
Shared: Action · Third-Person Shooter · Shooter

Apex Legends™
Shared: FPS · Action · Shooter

Far Cry 3
Shared: Action · FPS · Shooter

Black Mesa
Shared: Action · FPS · Shooter

GoreBox
Shared: Sandbox · FPS · Shooter

Battlefield™ 1
Shared: FPS · Action · War