Bloons TD 5. Tower Defense, Strategy, Action, Co-op. Dungeon Defenders. Tower Defense, RPG, Strategy, Co-op. Your Price.
They are by far superior than any steam - td. . 4 player coop 3rd person tower defense with RPG leveling and a Diablo style lootfest.
Deathtrap is a Tower Defense game with strong action- RPG elements, a game of vicious tricks, killing machines, rotating blades and splattering blood.