Multiplayer action/adventure games for PC/Windows with 4-player support

Oppidum

Players: 0 local, 4 online

Downward Spiral: Horus Station

Players: 0 local, 8 online

Run From Mummies

Players: 4 local, 0 online

Windlands 2

Players: 0 local, 4 online

Soundfall

Players: 4 local, 4 online

Woodle Tree 2: Deluxe

Players: 4 local, 0 online

The Survivalists

Players: 0 local, 4 online

Tribes of Midgard

Players: 0 local, 10 online

Half Dead

Players: 0 local, 8 online

Little Adventures

Players: 4 local, 0 online

Crystal Raiders VR

Players: 0 local, 4 online

A Robot Named Fight

Players: 4 local, 0 online

The Addams Family: Mansion Mayhem

Players: 4 local, 0 online

Those Who Came: Healing Solarus

Players: 0 local, 4 online

Cave Digger 2: Dig Harder

Players: 0 local, 4 online

Woodle Tree 2: Deluxe Plus

Players: 4 local, 0 online

ADIOS Amigos: Galactic Explorers

Players: 4 local, 0 online

Shoulders of Giants

Players: 0 local, 4 online

Space Chef

Players: 4 local, 0 online

Asterix & Obelix XXXL: The Ram From Hibernia

Players: 4 local, 0 online

Land Of Foot

Players: 4 local, 0 online

Risk of Rain Returns

Players: 4 local, 4 online

Towerborne

Players: 4 local, 4 online

Super Dungeon Designer

Players: 4 local, 0 online

HAINYA WORLD

Players: 0 local, 4 online