Multiplayer first person shooter games with 2-player online support

Left 4 Dead

Players: 4 local, 360 online

Call of Duty: World at War

Players: 4 local, 0 online

Codename: Outbreak

Players: 2 local, 0 online

PAYDAY 2

Players: 4 local, 0 online

Far Cry 4

Players: 2 local, 360 online

Call of Duty: Advanced Warfare

Players: 4 local, 0 online

Borderlands: The Handsome Collection

Players: 4 local, 0 online

The Goatman

Players: 3 local, 0 online

Halo Infinite

Players: 4 local, 0 online

Call of Duty: Modern Warfare 3

Players: 2 local, 0 online

Superbugs: Awaken

Players: 2 local, 0 online

Halo 4

Players: 4 local, 360 online

God Mode

Players: 4 local, 0 online

ORION: Prelude

Players: 5 local, 0 online

Tom Clancy's Rainbow Six Vegas

Players: 4 local, 360 online

Evolve

Players: 4 local, 0 online

Borderlands: The Pre-Sequel

Players: 4 local, 0 online

Killing Floor 2

Players: 6 local, 0 online

Insurgency: Sandstorm

Players: 8 local, 0 online

Verdun

Players: 4 local, 0 online

Deep Rock Galactic

Players: 4 local, 0 online

Shadow Warrior (1997)

Players: 2 local, 0 online

Killing Floor 2

Players: 6 local, 0 online

Arizona Sunshine

Players: 4 local, 0 online

Back 4 Blood

Players: 4 local, 0 online