N7

N7 is a vocational code in the Systems Alliance military. The "N" designates special forces and the "7" refers to the highest level of proficiency. It applies to marines who have graduated from an elite training program.

Appearances
In Mass Effect, if Shepard is equipped with any weight of Onyx Armor, the distinctive N7 and red detail on the right arm will be emblazoned on it.

In Mass Effect 2, the N7 emblem is visible on all customizable armor chest pieces except for the Kestrel Torso Sheath.

Known N7 Operatives

 * David Anderson - One of the first graduates of the N7 training program.
 * Commander Shepard
 * Kai Leng - Former Alliance Marine, who was imprisoned after killing a krogan on the Citadel during leave. Eventually recurited by the pro-human organization Cerberus for his skills and a documented history of confrontational and violent behavior toward aliens.

Trivia

 * According to The Art of Mass Effect, the red detail on the emblem symbolizes the human blood Shepard must sacrifice to stop Saren Arterius. The red stripe is also a historical reference to the red stripes commanders wore on early space missions to make them instantly recognizable.
 * The Medal of Valor achievement (completing Mass Effect on Insanity difficulty) unlocks an N7 gamer pic.
 * The design is available as a t-shirt and hoody from the Bioware Store.