In this video guide I will show you how to get 30 kills with the Tikhar. You can first get the Tikhar once you reach VOLGA level. It is above the workbench inside the train just pick it up and it will be your third weapon. At any point where you find a nice group of enemies just back up so you don't get spotted and make a quick save. Then go kill them all and reload the quick save. Just rinse and repeat till the achievement pops.