Multiplayer tower defense games for PC/Windows with 4-player split-screen support
Dungeon Defenders
Players: 4 local, 4 online
Alien 911
Players: 2 local, 4 online
Monster Outbreak
Players: 2 local, 4 online
Tavernacle!
Players: 4 local, 4 online
Players: 4 local, 4 online
Players: 2 local, 4 online
Players: 2 local, 4 online
Players: 4 local, 4 online