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

Don't Starve Together

Players: 0 local, 6 online

Hidden & Dangerous 2: Sabre Squadron

Players: 0 local, 4 online

Diablo

Players: 0 local, 4 online

Dungeon Lords

Players: 0 local, 4 online

System Shock 2

Players: 0 local, 4 online

Conflict Global Terror

Players: 0 local, 4 online

Torchlight II

Players: 0 local, 6 online

Icewind Dale

Players: 0 local, 6 online

Heroes of Hammerwatch

Players: 0 local, 4 online

Tom Clancy's Rainbow Six Vegas 2

Players: 0 local, 4 online

Warhammer: Vermintide 2

Players: 0 local, 4 online

Marvel Ultimate Alliance

Players: 4 local, 4 online

Tom Clancy's Ghost Recon: Advanced Warfighter 2

Players: 0 local, 12 online

Sacred

Players: 0 local, 4 online

Neverwinter Nights 2

Players: 0 local, 4 online

Bloody Trapland

Players: 4 local, 4 online

Tom Clancy's Rainbow Six: Rogue Spear

Players: 0 local, 8 online

Human Fall Flat

Players: 2 local, 8 online

Tom Clancy's Ghost Recon: Advanced Warfighter

Players: 0 local, 12 online

Unreal Tournament 3

Players: 0 local, 4 online

Dungeon of the Endless

Players: 0 local, 4 online

Dungeon Siege

Players: 0 local, 4 online

Baldur's Gate

Players: 0 local, 6 online

Risk of Rain 2

Players: 0 local, 4 online

X-Men Legends 2: Rise of Apocalypse

Players: 4 local, 4 online