You will become an assassin it his cool sniper game and your goal is to complete a total of 9 missions and a variety of weapons / attachments. You will start with a basic rifle and scope. Earn cash to purchase better equipment. To achieve mission success you have to read the briefings to find out how to complete your mission. Use YOUR MOUSE to control the game. If you can't shoot in Mission 9, its because you distracted the guards and the animation will play to complete the mission, its meant to have your firing disabled. Good luck!