"Enter one of these codes to change the color of the letters in your player name:

$0 - Black
$1 - White
$2 - Blue
$3 - Green
$4 - Red
$5 - Light Blue
$6 - Yellow
$7 - Pink
$8 - Orange
$9 - Gray

To be a red baron, enter $4Baron as your name." - TEM

"this is a tip for single player it works every where and is very simple dont go strait through to the enemy all the time explore first youll find routs that get you to good advantage points

and dont stay in the same spot either

heres an example

in the training mission right after you get the binocs you should go a bit further down the hill and shoot the two guys in the diff towers then shoot the explosive tank that is next to the shootning range to attract the enemy there go to the furthest right of the other side where the camp is and get on the tower furthest to the right

grab the ammo and then get back to the water where you crossed to the camp go all the way to the left side where youll find an inlet there you can go all the way past the camp to kill any patroling gaurds on the outside then keep killing a gaurd 1 by 1 moving around (without detection) after killing each enemy" - bunkeredurmom