Professional

Professional is an achievement in Metro Exodus.

Overview
On order to receive this achievement, the player must simply kill an enemy with each of the firearm weapons available to Artyom. Kills with explosives and other throwables are not required to get this achievement.

Weapons that the player needs to use are:
 * Shambler - This is a starting weapon in the very first level of the game.
 * Kalash - Artyom is given one during the Moscow level. Can be picked up off most human enemies throughout the game.
 * Revolver - Artyom is given one during the Moscow level by Yermak.
 * Bastard - This weapon can be picked up off most human enemies throughout the game. One can be found in a house on the water near the area where Artyom first comandeers a boat at the beginning of the Volga level.
 * Ashot - Can be picked up off most human enemies throughout the game or found in the enviroment starting in the Volga level.
 * Tikhar - Given to Artyom by Tokarev during the Volga level.
 * Valve - Can be found during the Caspian level from some enemies. It can also be found in the bridge of the ship that is about halfway between Saul's outpost and the lighthouse, laying on a crate near an oil lamp. Guaranteed drop from a sniper enemy on a crane that Anna gives the player a mission to eliminate.
 * Bulldog - Can be found during the Caspian level dropped from certain enemies when helping Giul in the lighthouse.
 * Helsing - Picked up at the beginning of the Taiga level from a statue in front of the starting point.
 * Gatling - Rare gun, dropped from the Armord Heavy Troopers. One during the Yamantau level just before rescuing Anna, three during the Caspian level, one when Aurora's crew is attacked at the Aurora by the Barons men, one is guarding the slaves in the prison hulk, and the last when defending against the attackers at the top of the oil rig.