Horrible Game, dont waste your time!

Theyve created the game to require you to spend money. With lack of spots to place towers, and too powerful enemies, its impossible to get past the third world. Again, they designed this so you HAVE to spend money, and lots of it, in order to progress. So unless youre prepared to spend a substantial amount of money, dont buy this game.
Gameplay is fun, but ruined by the creators.

WorldTravels1865 about Royal Defense: Invisible Threat