Games like Unlock the Three
Games like Unlock the Three include Ready or Not, Left 4 Dead 2, Resident Evil Requiem, DOOM, and Dying Light. We matched them by the tags players give Unlock the Three on Steam (FPS, Action, Action RPG, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

Ready or Not
Shared: FPS · Realistic · Tactical

Left 4 Dead 2
Shared: FPS · Action · Zombies

Resident Evil Requiem
Shared: Action · FPS · Horror

DOOM
Shared: FPS · Action · First-Person

Dying Light
Shared: Horror · First-Person · Zombies

Insurgency: Sandstorm
Shared: FPS · Action · Realistic

Apex Legends™
Shared: FPS · Action · First-Person

Bodycam
Shared: FPS · Realistic · Tactical

Call of Duty®
Shared: FPS · Action · First-Person

DOOM Eternal
Shared: FPS · Action · Gore

Arena Breakout: Infinite
Shared: FPS · Realistic · First-Person

Insurgency
Shared: FPS · Action · Realistic

Resident Evil Village
Shared: Action · First-Person · Horror

Enlisted
Shared: Action · FPS · First-Person

Warhammer 40,000: Darktide
Shared: FPS · Action RPG · Horror

Killing Floor 2
Shared: FPS · Action · Zombies

Back 4 Blood
Shared: FPS · Action · Zombies

DOOM 3
Shared: Action · FPS · Horror

Killing Floor
Shared: FPS · Action · Horror

THE FINALS
Shared: FPS · Action · First-Person

Arma 3
Shared: Action · First-Person · FPS