Castle Keeper is a challenging shooting game on www.flash-games.net for free. The goal for you is to keep the castle by killing as many enemies as you can. In this game, you can use left/right arrow keys to adjust the archer angle and use up/down arrow keys to add or remove the archers. Press spacebar to give fires! Number keys of 0 to 9 represent different stunts in shooting which will help you sharply enhance the efficiency of attack. If you miss some of the invaders, they will destroy the castle and you will lose the game. Come on and no mistake to shoot invaders!