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

Sniper Elite: Nazi Zombie Army

Players: 0 local, 4 online

Red Dead Redemption 2

Players: 0 local, 4 online

Star Trek: D-A-C

Players: 0 local, 6 online

Warhammer 40,000: Space Marine

Players: 0 local, 4 online

Kill to Collect

Players: 4 local, 4 online

Freaky Awesome

Players: 4 local, 4 online

Miner Wars 2081

Players: 0 local, 16 online

Dawnstar

Players: 0 local, 4 online

Teenage Mutant Ninja Turtles: Mutants in Manhattan

Players: 0 local, 4 online

Dead Rising 4

Players: 0 local, 4 online

Genetic Disaster

Players: 4 local, 4 online

Probably Archery

Players: 0 local, 5 online

Knight Squad

Players: 8 local, 8 online

The Forgettable Dungeon

Players: 4 local, 4 online

Drunk-Fu: Wasted Master

Players: 8 local, 8 online

Geneshift

Players: 0 local, 4 online

Majestic-12

Players: 4 local, 4 online

MORDHAU

Players: 0 local, 6 online

Hellraid

Players: 0 local, 4 online

GIBZ

Players: 4 local, 4 online

Insania

Players: 4 local, 4 online

Guncraft: Blocked and Loaded

Players: 0 local, 4 online

Ravaged - Zombie Apocalypse

Players: 0 local, 5 online

Swimsanity!

Players: 4 local, 4 online

Innchanted

Players: 4 local, 4 online