Your base is being attacked by soldiers of an enemy army and luckily you are in a strategic point in order to shoot. Defend yourself from the attack of the enemy army soldiers and kills them before they destroy you. Use various weapons to eliminate them before they have finished with the structure of the barracks. As you progress through the game to buy better weapons.
Fire - LEFT MOUSE
Zoom Down Sight - SPACE BAR
Reload - R, or click when out of ammo
Switch Weapon - Arrow keys DOWN or UP