Multiplayer action/adventure games for PC/Windows with 2-player support

Half Dead 3

Players: 2 local, 4 online

Salt and Sacrifice

Players: 2 local, 2 online

Zag Heroez Miraculous: Rise of the Sphinx

Players: 2 local, 0 online

DC's Justice League: Cosmic Chaos

Players: 2 local, 0 online

Necropolis

Players: 0 local, 4 online

Saints Row IV

Players: 0 local, 2 online

The Binding of Isaac: Rebirth

Players: 2 local, 4 online

Westerado: Double Barreled

Players: 2 local, 0 online

How to Survive 2

Players: 4 local, 4 online

How to Survive

Players: 2 local, 2 online

Tobe's Vertical Adventure

Players: 2 local, 0 online

Abyss Odyssey

Players: 2 local, 2 online

Riverbond

Players: 4 local, 0 online

Toy Story 3

Players: 2 local, 0 online

The Incredibles: Rise of the Underminer

Players: 2 local, 0 online

LEGO The Hobbit

Players: 2 local, 0 online

Darksiders Genesis

Players: 2 local, 2 online

Hidden Deep

Players: 2 local, 0 online

The Cursed Crusade

Players: 2 local, 2 online

Salt and Sanctuary

Players: 2 local, 0 online

Max Payne 3

Players: 0 local, 2 online

A Valley Without Wind 2

Players: 0 local, 8 online

A Valley Without Wind

Players: 0 local, 16 online

Hamilton's Great Adventure

Players: 2 local, 0 online

Skylanders: Spyro's Adventure

Players: 2 local, 0 online