Kill 30 enemies with Tikhar.

You will be given the Tikhar by Tokarev during the Volga level after completing the initial objective to investigate the church and before you're told to go and rescue Krest. The Tikhar is an air rifle and must be pumped by holding 'X' then pressing 'RT' to give it as much power as possible. It is a weak gun in combat, however when fully pumped up and in stealth it will kill most enemies in one shot.