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

Demonologist

Players: 0 local, 4 online

Trine 5: A Clockwork Conspiracy

Players: 4 local, 4 online

Gatekeeper

Players: 0 local, 4 online

Bish Bash Bots

Players: 4 local, 4 online

Phantasy Star Online 2 New Genesis

Players: 0 local, 12 online

Rogue Heroes: Ruins of Tasos

Players: 4 local, 4 online

DDraceNetwork

Players: 0 local, 64 online

Gotham Knights

Players: 0 local, 4 online

Puyo Puyo Tetris 2

Players: 0 local, 4 online

Pacify

Players: 0 local, 4 online

Firefighting Simulator - The Squad

Players: 0 local, 4 online

Ember Knights

Players: 4 local, 4 online

Hand Simulator: Horror

Players: 0 local, 4 online

Stormworks: Build and Rescue

Players: 0 local, 6 online

Escape Simulator

Players: 0 local, 10 online

Across the Obelisk

Players: 0 local, 4 online

Aground

Players: 0 local, 4 online

Age of Mythology: Extended Edition

Players: 0 local, 6 online

Teenage Mutant Ninja Turtles: Shredder's Revenge

Players: 6 local, 6 online

Age of Empires II: Definitive Edition

Players: 0 local, 4 online

Age of Empires II: HD Edition

Players: 0 local, 4 online

Age of Empires II: The Age of Kings

Players: 0 local, 4 online

Shotgun Farmers

Players: 0 local, 4 online

SYNTHETIK 2

Players: 0 local, 4 online

Deadswitch 3

Players: 0 local, 5 online