Multiplayer games for PC/Windows with 4-player online support

Earth Defense Force 5

Players: 2 local, 4 online

ORION: Prelude

Players: 0 local, 5 online

Final Exam

Players: 2 local, 4 online

Halo Infinite

Players: 0 local, 4 online

Crab Champions

Players: 0 local, 4 online

Age of Wonders III

Players: 4 local, 4 online

Running with Rifles

Players: 0 local, 32 online

Borderlands: The Pre-Sequel

Players: 0 local, 4 online

Killing Floor 2

Players: 0 local, 6 online

Tom Clancy's Rainbow Six: Siege

Players: 0 local, 5 online

Super Dungeon Bros

Players: 4 local, 4 online

Windward

Players: 0 local, 100 online

Trailmakers

Players: 0 local, 8 online

Lunch Lady

Players: 0 local, 4 online

Minecraft

Players: 0 local, 8 online

Zombasite

Players: 0 local, 16 online

Fortified

Players: 0 local, 4 online

Portal Knights

Players: 2 local, 4 online

The Wild Eight

Players: 0 local, 8 online

Bang-On Balls: Chronicles

Players: 2 local, 4 online

Astroneer

Players: 0 local, 4 online

Lost Castle

Players: 4 local, 4 online

GOD EATER 2: Rage Burst

Players: 0 local, 4 online

Gears of War 4

Players: 2 local, 5 online

Dragon Ball Xenoverse 2

Players: 0 local, 6 online