Glissaria is a Tower Defense game that not only uses the traditional tower defense units to defend you land but also has many elements of RPG games, and Puzzle games that will keep you on your toes and looking for the best tower defense strategy to keep your base defended.  Your mission in Glissaria tower defense is to help the young Prince Trey set up tower defense units so that he can protect the Northern quadrant of Glissario from being over run by monsters.  In the Glissaria tower defense game you can collect resources that will help you defend against the monsters.  You also get to build and upgrade your tower defense units.  The more monsters you kill the more points you earn towards leveling up and getting more power tower defense units.  You will need a good strategy to protect Glissaria.  Good luck.