No Shooting Allowed is an achievement/trophy in Metro: Last Light. It is awarded to the player if they kill 10 enemies in a row with throwing knives. It is very easy to do on any human stealth section, but early levels, like Facility or Separation, are best as the enemies do not wear armour. The kills do not have to be stealthy, but, obviously, it will make the achievement/trophy easier to unlock if they are. Unless you do this on Ranger Mode, you will not carry 10 throwing knives, so will have to retrieve them from bodies. Below is a video guide if you are having trouble.