Tap the screen to choose your weapon from the armory, including RPG. Aim at the targets by dragging your finger or mouse. Activate the shoot button to eliminate them. Gather loot to earn power-ups. Call in your helpers for extra firepower when facing tougher foes. Advance through multiple levels, each with distinct challenges. Change your tactics based on the enemy types and environmental factors. Finish all levels to unlock new gear and skills.