Multiplayer twin stick shooter games for PC/Windows with 4-player online support

Congo

Players: 0 local, 4 online

Meltdown

Players: 0 local, 4 online

A Mass of Dead

Players: 0 local, 4 online

Trident's Wake

Players: 4 local, 4 online

The Mutational

Players: 0 local, 4 online

Death Carnival

Players: 4 local, 4 online

Blacklist Brigade

Players: 0 local, 4 online

Monsters and Monocles

Players: 4 local, 4 online

Dead Motherland: Zombie Co-op

Players: 0 local, 4 online

ZCREW

Players: 0 local, 4 online

Down2Die

Players: 0 local, 4 online

Stardrift Nomads

Players: 0 local, 8 online

Serious Sam's Bogus Detour

Players: 4 local, 12 online

Robo Revenge Squad

Players: 4 local, 4 online

Sun Warriors

Players: 4 local, 4 online

Mobmania

Players: 0 local, 4 online

Rift Loopers

Players: 0 local, 4 online

Exterminate Zombies: Get Paid

Players: 0 local, 4 online

CONTRA: ROGUE CORPS

Players: 0 local, 4 online

Pigeons Attack

Players: 4 local, 4 online

Relic Hunters Legend

Players: 0 local, 4 online

POSTAL Redux

Players: 0 local, 4 online

ROGUE SHIFT

Players: 0 local, 4 online

Begone Beast

Players: 4 local, 4 online

Line Hold

Players: 0 local, 4 online