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

Quest Hunter

4 local, 4 online

Unrailed!

4 local, 4 online

Factorio

0 local, 500 online

Sniper Elite 4

0 local, 4 online

Duke Nukem 3D: 20th Anniversary Edition World Tour

0 local, 4 online

Arizona Sunshine

0 local, 4 online

World War Z

0 local, 4 online

Band of Defenders

0 local, 4 online

Attack on Titan 2

0 local, 4 online

Age of Empires: Definitive Edition

0 local, 4 online

EMERGENCY 20

0 local, 4 online

Generation Zero

0 local, 4 online

Naruto to Boruto: Shinobi Striker

0 local, 4 online

GOD EATER 3

0 local, 8 online

Rec Room

0 local, 4 online

HYPERCHARGE: Unboxed

4 local, 4 online

Borderlands: Game of the Year Edition

0 local, 4 online

Sea of Thieves

0 local, 4 online

Zombie Army 4: Dead War

0 local, 4 online

Marvel's Avengers

0 local, 4 online

Wolcen: Lords of Mayhem

0 local, 4 online

Gunfire Reborn

0 local, 4 online

Just Die Already

0 local, 4 online

DESOLATE

0 local, 4 online

The Forest

0 local, 8 online