Hardline

Cheat Mode:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "hardline.cfg" file. Add the case-sensitive entry "CHEATING IS SOMETIMES USEFUL BUT FOR HOW LONG ???" at the end of the file to enable cheat mode. Then, press one of the following keys during game play to activate the corresponding cheat function. 

Function - Code

Invincibility - X 
Kill all visible enemies - Backspace 
Full health - Insert 
Secondary weapon ammo - Page Up 
Main weapon ammo – Home