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

IronWolf: Free Non-VR Edition

Players: 0 local, 4 online

World War Z

Players: 0 local, 4 online

Zero-K

Players: 0 local, 20 online

The Forest

Players: 0 local, 8 online

BROFORCE

Players: 4 local, 4 online

Starbound

Players: 0 local, 8 online

Escape the Backrooms

Players: 0 local, 4 online

Rogue Glitch Ultra

Players: 4 local, 4 online

SCP: 5K

Players: 0 local, 4 online

The Outlast Trials

Players: 0 local, 4 online

Magicka 2

Players: 4 local, 4 online

Gunfire Reborn

Players: 0 local, 4 online

Deep Rock Galactic

Players: 0 local, 4 online

Alien Swarm: Reactive Drop

Players: 0 local, 8 online

Daemon X Machina

Players: 0 local, 4 online

TerraTech

Players: 0 local, 4 online

Hero Siege

Players: 4 local, 4 online

Zombie Army Trilogy

Players: 0 local, 4 online

Age of Empires III

Players: 0 local, 4 online

Plants vs Zombies: Garden Warfare 2

Players: 0 local, 4 online

Palworld

Players: 0 local, 32 online

Gang Beasts

Players: 4 local, 8 online

CounterAttack: Uprising

Players: 4 local, 8 online

Mindustry

Players: 0 local, 16 online

Age of Empires III: Definitive Edition

Players: 0 local, 4 online