Air Defence 3 is the best defend your castle style game available. You get money by shooting down fighter and bomber planes. With your cash you can purchase upgrades, turrets and even tanks. If that isn’t enough all of your tanks collect experience by blasting planes out of the sky.

I would only change a few things about the game. It’s not a big deal but it would be nice if there were more than two types of enemy airplanes. Then like every other flash game I would like to see a multiplayer feature.