Load the catapult and collapse the Vikings in building. Challenge 33 levels and show all your strategic skills to get the best score and all the gold medals.
Shoot down the enemies with a handgun or sniper rifle. Don't let any of them get away as you move onto new levels. Note: It takes awhile to load from blank white screen.
Deplete enemy's invasion forces and stop their offensive. When facing a large number of enemies, the only way to deter them is to use the powerful Haiphong battery.
Shoot the enemies down and destroy their camps to complete each mission. Buy new weapons from the shop to upgrade and destroy all enemy camps to win the game.