Multiplayer puzzle platformer games for PC/Windows with 4-player online support
Trine 5: A Clockwork Conspiracy
Players: 4 local, 4 online
Trine 4: The Nightmare Prince
Players: 4 local, 4 online
PICO PARK
Players: 10 local, 10 online
Tiny Brains
Players: 4 local, 4 online
Spelunker Party!
Players: 4 local, 4 online
Astronimo
Players: 4 local, 4 online