Both your parents were in the Alliance Military. Your childhood was spent
 on ships and stations as they transferred from posting to posting, never
 staying in one location for more than a few years. Following in your
 parent's footsteps, you enlisted at the age of eighteen.

You were born and raised on Mindoir, a small border colony in the Attican
 Traverse. When you were sixteen, slavers raided Mindoir, slaughtering your
 family and friends. You were saved by a passing Alliance patrol and you 
 enlisted with the military a few years later.

As an Earthborn, you had a rough childhood in the slums on Earth and have
 a gritty edge to your personality.

During your service, a mission you were on went horribly wrong. Trapped in an
 extreme survival situation, you had to overcome physical torments and 
 psychological stress that would have broken most people. You survived while  
 those around you fell, and now you alone is left to tell the tale.

Early in your military career you found yourself facing an overwhelming enemy
 force. You risked your own life to save your fellow soldiers and defeat the
 enemy despite the impossible odds. Your bravery and heroism have earned you
 medals and recognition from the Alliance fleet.

Throughout your military career, you have held fast to one basic rule: get 
 the job done. You've been called cold, calculating, and brutal. Your 
 reputation for ruthless efficiency makes your fellow soldiers wary of you.
 But when failure is not an option, the military always goes to you first.

The Soldier is your pure combat class, they are those who use guns to solve
all their problems. They can use all 4 weapons without relative ease, the only
class that is able to use Heavy Armour and they have the ability to use First
Aid. This is the best option for first time players because its easy to use,
point and shoot. The class of a default Shepard or a quick Shepard.

The Engineer is like the Soldier, a pure user, but of Tech this time. They
are the masters of cracking locks and hacking into systems, and also hacking
and disabling enemy units. Since the Geth are electronic, you can hack into
them to render them useless. They are going to be a support unit, since this
isn't Battlefield 2 and you don't get a Shotgun.

The Adept is the last pure user, the user of Biotics, or Jedi. With this,
you will be able to defend yourself with Barrier, or throw your enemies
to render them useless. However, they will lack the offensive power or the
tech power that would be required for an all round unit.

The Infiltrator is a combination of Combat and Tech. They have the offensive
hacking powers of the Engineer and the long range and close range stopping
power of a Soldier. They are a very powerful class, the other being the
Vanguard. With Combat and Tech, they can easily go through the game without
need for a support squad.

The Sentinel is the combination of Techs and Biotics. This can be quite useful
but there lies a problems. You don't have the combat capabilities of bringing
down the enemy. This class is again a support class since you can't take the
enemy down.

The Pure Jedi class, the Vanguard is one of the most powerful classes, they
can combine Biotics and Combat together. They however, lack the Tech powers to
take down locks and that will seriously undermine your support squad. They
can easily knock down foes, throw them and fire.