Multiplayer first person shooter games for PC/Windows with 4-player support
Serious Sam: The First Encounter
Players: 4 local, 16 online
DOOM 3: OpenCoop (Mod)
Players: 0 local, 4 online
Call of Duty: World at War
Players: 0 local, 4 online
Halo Infinite
Players: 0 local, 4 online
ORION: Prelude
Players: 0 local, 5 online
Borderlands: The Pre-Sequel
Players: 0 local, 4 online
Killing Floor 2
Players: 0 local, 6 online
Verdun
Players: 0 local, 4 online
Back 4 Blood
Players: 0 local, 4 online
Star Wars Battlefront II (2017)
Players: 0 local, 4 online
Unfortunate Spacemen
Players: 0 local, 10 online
Halo: The Master Chief Collection
Players: 0 local, 4 online
Serious Sam 2
Players: 4 local, 6 online
Quake
Players: 0 local, 16 online
Shadow Warrior 2
Players: 0 local, 4 online
Serious Sam: The Second Encounter
Players: 0 local, 16 online
PAYDAY 2
Players: 0 local, 4 online
Warhammer 40,000: Darktide
Players: 0 local, 4 online
ArmA II
Players: 0 local, 4 online
Close Combat: First to Fight
Players: 0 local, 4 online
Contagion
Players: 2 local, 8 online
Killing Floor
Players: 0 local, 6 online
No One Lives Forever: Spy in HARM's Way
Players: 0 local, 4 online
Object N
Players: 0 local, 4 online
Generation Zero
Players: 0 local, 4 online