I recently develped a Tower Defense (Clone) in a Medieval Setup that's a little more like the "old" WC3 Tower Defense Games. Main Features of the Game:
* 100 Levels with over 50 unique animated Monsters / Bosses
* Free Placement of Tower to "maze" the game field like you want to
* World HighScore List to compete with other player who survive longest =)
* Tower Tuning "like you want to"
Maybe take a look at the free Version first:
If you like it you can switch to the Full Verision at:
If you have any suggestions don't hesitate to contact me