In Invasion 3 you have to attack a castle instead of defending it. You are playing as a Commander of the troops and your aim is to knock down the enemy castle using your soldiers and weaponry. First build up your troops then when you think you are ready, start the game! Click on the troops type to deploy them. You'll be on the battlefield. You win by reducing the castle to a flaming pile of rubble. Use your best judgement to buy the right type of troops for the battle.