you are a hero to save the city conquered by terrorists. You have white hair and wear a white coat. At the beginning, you are given a pistol and four grenades. The city is quiet and nobody is in the street. But danger hides behind every building. The enemies may break the windows glasses and jump out from the house. They may also suddenly appear from the doors. The terrorists all hold rifles to shoot you. So you must move quickly to fire at them and avoid the bullets from them. Sometimes it is necessary for you to have a lateral jump by arrow keys. You can also press the space bar to throw a grenade. There are so many cars stopping in the street and you can use them to hide yourself. Try to kill enemies as more as possible and go as far as possible. Save the city. It?s the call of duty. Move now!