Place the following line as the last line in the "hardline.cfg" file. Type it exactly as shown or it won't work (NOTE: case-sensitivity and spaces):

CHEATING IS SOMETIMES USEFUL BUT FOR HOW LONG ???

When enabled, the following are the cheat keys:

• X-Invincibility
• BACKSPACE KEY-Kill all enemies on screen
• HOME KEY-Gain main weapon ammo
• INSERT KEY-Full health
• PAGE UP KEY-Gain accessory weapon ammo