Multiplayer games for PC/Windows with 2-player online support

Men of War

Players: 0 local, 4 online

Outward

Players: 2 local, 2 online

Swat 4

Players: 0 local, 8 online

Saints Row 2

Players: 0 local, 2 online

Door Kickers: Action Squad

Players: 2 local, 2 online

Son of Nor

Players: 2 local, 4 online

Double Dragon Neon

Players: 0 local, 2 online

Elite: Dangerous

Players: 0 local, 4 online

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

Lara Croft and the Guardian of Light

Players: 2 local, 2 online

Tom Clancy's Ghost Recon: Advanced Warfighter 2

Players: 0 local, 12 online

Sacred

Players: 0 local, 4 online

Gears of War

Players: 0 local, 2 online

Neverwinter Nights 2

Players: 0 local, 4 online