Instructions
Kill opposing forces. Killing an enemy soldier will automatically net you experience points that are automatically applied to ranking your character up. Conversely, killing a teammate will deduct experience points from your character.
Complete special team-based objectives. Many of the game modes require players to complete specific objectives, such as planting or defusing a bomb. Anytime these objectives are completed, you will earn a bonus to your experience points.
Win as many matches as possible. If you are on the winning team of a multiplayer match, you will be awarded a bonus to your experience points that are automatically applied to increasing your rank.