Multiplayer first person shooter games for PlayStation 4 with 4-player local/couch support
Call of Duty: Black Ops 4
Players: 4 local, 4 online
Borderlands: Game of the Year Edition
Players: 4 local, 4 online
Borderlands: The Handsome Collection
Players: 4 local, 4 online
Call of Duty: Black Ops 3
Players: 4 local, 4 online
Gunscape
Players: 4 local, 4 online
DOOM (1993)
Players: 4 local, 0 online
DOOM II
Players: 4 local, 0 online
Serious Sam Collection
Players: 4 local, 16 online
Quake (Enhanced)
Players: 4 local, 4 online
Quake II (Enhanced)
Players: 4 local, 8 online
DOOM + DOOM II
Players: 4 local, 16 online