Multiplayer games for PC/Windows with 6-player online support

Clonk Rage

Players: 4 local, 12 online

Conquest of Elysium 5

Players: 12 local, 12 online

Silica

Players: 0 local, 12 online

Anno 1800

Players: 0 local, 16 online

IL-2 Sturmovik: Battle of Stalingrad

Players: 0 local, 16 online

Starship Troopers: Extermination

Players: 0 local, 16 online

DDraceNetwork

Players: 0 local, 64 online

Zero-K

Players: 0 local, 20 online

The Forest

Players: 0 local, 8 online

Starbound

Players: 0 local, 8 online

Alien Swarm: Reactive Drop

Players: 0 local, 8 online

Gang Beasts

Players: 4 local, 8 online

CounterAttack: Uprising

Players: 4 local, 8 online

Mindustry

Players: 0 local, 16 online

Palworld

Players: 0 local, 32 online

Barotrauma

Players: 0 local, 16 online

Raft

Players: 0 local, 10 online

Forza Horizon 4

Players: 0 local, 6 online

Stardew Valley

Players: 8 local, 8 online

PICO PARK

Players: 10 local, 10 online

Duke Nukem 3D Megaton Edition

Players: 0 local, 8 online

Duke Nukem 3D: 20th Anniversary Edition World Tour

Players: 0 local, 8 online

Factorio

Players: 0 local, 500 online

Baldur's Gate II

Players: 0 local, 6 online

Valheim

Players: 0 local, 10 online