Multiplayer tower defense games for PC/Windows with 2-player support

Stellar Survivor

Players: 0 local, 2 online

Toy Soldiers: Cold War

Players: 2 local, 2 online

Duke of Defense

Players: 2 local, 0 online

Automata Break

Players: 2 local, 0 online

Assault On Metaltron

Players: 2 local, 0 online

The Guardian Stone

Players: 0 local, 4 online

Voodolls

Players: 0 local, 4 online

Bloons TD 6

Players: 0 local, 4 online

Rogue Star Rescue

Players: 2 local, 4 online

Forge Squad

Players: 4 local, 0 online

Rock of Ages 2: Bigger & Boulder

Players: 2 local, 0 online

Guardian Chronicle

Players: 0 local, 2 online

Element TD 2 - Multiplayer Tower Defense

Players: 0 local, 8 online

Fiery Disaster

Players: 2 local, 0 online

Traveler's Bastion

Players: 2 local, 0 online

Monster Outbreak

Players: 2 local, 4 online

Legion TD 2 - Multiplayer Tower Defense

Players: 0 local, 4 online

TailQuest Defense

Players: 2 local, 0 online

Scrapshoot

Players: 2 local, 0 online

Lesson Learned

Players: 4 local, 0 online

Rhythm Towers

Players: 2 local, 2 online

ChronoDojo

Players: 2 local, 0 online

Keep Keepers

Players: 4 local, 4 online

Lesson Learned: Cult of the Elizabeth

Players: 4 local, 0 online

Final Stand: Ragnarök

Players: 0 local, 10 online