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

Dungeons & Dragons: Daggerdale

Players: 2 local, 4 online

Omerta: City of Gangsters

Players: 0 local, 2 online

Apache: Air Assault

Players: 0 local, 4 online

The Darkness II

Players: 0 local, 4 online

The Chaos Engine

Players: 2 local, 2 online

The Incredible Adventures of Van Helsing II

Players: 0 local, 4 online

Warhammer 40,000: Dawn of War II

Players: 0 local, 2 online

Call of Duty: Black Ops

Players: 0 local, 6 online

America's Army: Special Forces

Players: 0 local, 9 online

Aliens vs Predator

Players: 0 local, 4 online

Painkiller Resurrection

Players: 0 local, 4 online

Serious Sam HD: The Second Encounter

Players: 0 local, 16 online

Conflict: Vietnam

Players: 0 local, 4 online

Insanely Twisted Shadow Planet

Players: 4 local, 4 online

Frozen Synapse

Players: 2 local, 2 online

Max Payne 3

Players: 0 local, 2 online

ORION: Prelude

Players: 0 local, 5 online

DungeonLand

Players: 3 local, 3 online

Beat Hazard

Players: 2 local, 2 online

Sacred 3

Players: 2 local, 4 online

Lead and Gold: Gangs of the Wild West

Players: 0 local, 2 online

Wolfenstein: Youngblood

Players: 0 local, 2 online

Aliens: Colonial Marines

Players: 0 local, 4 online

Dead Rising 2

Players: 0 local, 2 online

Magic 2014 - Duels of the Planeswalkers

Players: 2 local, 2 online