When you begin the game you start with the rank of 'Private' and you can only command one AI unit to follow you. When you earn a certain amount of Medals during gameplay you get promoted to a higher rank and are able to command more AI units.

Unlock Sergeant Rank (Lead 2 Men):
Get 20 Medals.

Unlock Captain Rank (Lead 3 Men):
Get 100 Medals.

Unlock General Rank (Lead 4 Men):
Get 300 Medals.

At the 'Instant Action' menu hold your cursor above the 'Battlefront II' logo which is at the bottom left corner of the screen and if you have placed it in the correct spot text will appear above it. Select the different texts to unlock features in the game.

Unlock God Mode:
Select 'mostimpressive' text.

Unlock Infinite Ammo:
Select 'agoodblasteratyourside' text.

Turn Off HUD:
Select 'usetheforceluke' text.

Open your Profile and click the 'Instant Action' tab and at the bottom left of the screen and place your mouse pointer in the area just above the Battlefront II logo which is in the background. If your mouse pointer is in the correct position you will be able to enter text, enter the code 456123 and press 'Enter' and the text 'Play it again, Han' will appear on screen as confirmaton of correct code entry. When you now go to the Campaign menu there will be a new option called 'Campaign List'.

Unlock more Powerful Weapons:

Unlock Particle Beam Rifle:
Get Legendary Status in Marksman

Unlock Precision Blaster:
Get Legendary Status in Gunslinger

Unlock Elite Assault Rifle:
Get Legendary Status in Frenzy

Unlock Flechette Shotgun:
Get Legendary Status in Regulator

Unlock Guidable Rockets:
Get Legendary Status in Demolition

Unlock Vehicle Regen:
Get Legendary Status in Technician


Unlockable Medals
To unlock medals you must get the corresponding using only one life. When you get Elite in a category then that medal is easier to get.

Unlock Technician Medal:
Slice into 1 Vehicle. No change for Elite.

Unlock Demolition Medal:
Deal 4 critical hits on vehicles with Rocket Launcher. 3 in Elite.

Unlock Gunslinger Medal:
Get 6 kills with a Pistol. 4 in Elite.

Unlock Marksman Medal:
Get 6 Headshots with a Sniper Rifle. 4 in Elite.

Unlock Regulator Medal:
Get 8 kills with a Shotgun. 6 in Elite.

Unlock Endurance Medal:
Get 12 Points. 9 in Elite.

Unlock Frenzy Medal:
Get 12 kills with a Blaster Rifle. 9 in Elite.

Unlock Guardian Medal:
Get 24 Points. 18 in Elite.

Unlock War Hero Medal:
Get 36 Points. 27 in Elite. Medal Ranks
During the course of a game your rank will gradually increase in the corresponding category. Unlock Veteran Status:
Get Four Medals in the Category

Unlock Elite Status:
Get 32 Medals in the Category

Unlock Legendary Status:
Get 64 Medals in the Category