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

Smithworks

Players: 0 local, 4 online

Earth Defense Force 4.1: The Shadow of New Despair

Players: 2 local, 4 online

Inside the Backrooms

Players: 0 local, 4 online

HYPERCHARGE: Unboxed

Players: 4 local, 4 online

Steel Division 2

Players: 0 local, 5 online

Borderlands: Game of the Year Edition

Players: 0 local, 4 online

Just Sign!

Players: 4 local, 4 online

Jigsaw Puzzle Dreams

Players: 0 local, 10 online

Conan Chop Chop

Players: 4 local, 4 online

Zombie Army 4: Dead War

Players: 0 local, 4 online

Plants vs Zombies: Battle for Neighborville

Players: 0 local, 4 online

Escape Memoirs: Mini Stories

Players: 0 local, 5 online

Portal Dungeon

Players: 0 local, 4 online

Gatedelvers

Players: 0 local, 4 online

Baldur's Gate III

Players: 2 local, 4 online

Volcanoids

Players: 0 local, 4 online

Devour

Players: 0 local, 4 online

Scrap Mechanic

Players: 0 local, 5 online

Craftopia

Players: 0 local, 8 online

Abiotic Factor

Players: 0 local, 6 online

Never Split the Party

Players: 0 local, 4 online

Just Die Already

Players: 0 local, 4 online

Vagante

Players: 4 local, 4 online

Roots of Pacha

Players: 0 local, 4 online

Witchtastic

Players: 4 local, 4 online