In Kingdom Defense, an entertaining Castle defense game, defend your castle against wizards, ghosts, devils, and a slew of other monsters. 5 different castles, 15 different creatures, +50 various levels, and many other things await you. Improve your four general skills by six times and you'll be unstoppable. At each level, you will face more difficult monsters. Every creature you kill will reward you with money. You can use the gold you earn to upgrade your castle or construct new ones.