Game Modes
Complete certain tasks within the game to unlock different modes of play. To unlock the hard level of play, you will need to complete the Decisions, Decisions stage of the game. Pay 2,000 points, and you can access the hard mode. Once you have cleared all of the levels of gameplay in the hard mode, you can pay 3,000 points to access the very hard mode. This provides you with the option of different levels.
Unlimited Ammunition
Achieve unlimited ammunition within the game, and you will find that you can complete the levels much easier. To receive unlimited ammunition, you need 50,000 points and to complete every level with 100 percent completion. This will allow you to use the unlimited ammo in the harder levels.
Free Health
Use the elevator in the Decisions, Decisions scenario. When you do this, you will go to B2F, where you will find George injured and lying on the floor. After you talk to him, he will give you recovery medicine and antivirus medicines for free. This cheat can only be accessed once during gameplay. This is helpful for healing while you are trying to get through the level.
Bonus Points
Accomplish certain tasks within each level to gain bonus points. Go through an entire level without getting hurt, and you will gain 2,000 points for no damage. Gain another 2,000 points by allowing no damage and by using no weapons. You can gain extra bonus points by keeping your partners alive. Earn up to 40,000 bonus points by finishing a scenario in a record-breaking time. Try to complete a scenario in less than 10 minutes for maximum bonus points.
Safe Codes in Hellfire
Enter a number of codes in the Hellfire scenario to open the safe. According to CheatCodes.com, one of the following codes will work: "0721," "2287," "6354" or "5128." In room 101, you will find another safe on which you can try "JIA," "BAE," "GGF" or "DCH."