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