Instructions
Navigate through all game areas containing enemies, and kill enemies to accrue five experience points per enemy. If you are playing on a team with other online players, you accrue 10 experience points for each enemy kill.
Kill enemies in unique ways to get double the standard experience points. These kills are known as "Special Kills" and refer to those that are achieved in a unique way. A head shot (blowing the head off the enemy), a kill using only a knife as the weapon, or a kill by grenade is a Special Kill. A multi-kill, which happens when you kill more than one enemy with a single bullet or via peripheral damage from a single kill will also count as a Special Kill.
Accept every mission that you are offered and complete the mission to earn 50 experience points. Although you may not be able to successfully complete a mission on the first try, it will be available to you again and you may continue trying until you do complete it successfully.
Take the training course to learn bomb diffusing when it is offered. Anytime that you successfully diffuse a bomb in "Soldier Front" you will be awarded 50 experience points. If you are within a mission at that time, you will also be given credit for completing that particular mission, but will not receive double XP.