Using this Trainer:
Launch the trainer first, then launch the Game and then Press F1 at the Main Menu.
Listen for "Activated".
Press desired option key
Options in Promo:
F7 Key: Instant Tag Enemies
Numpad 1: Unlimited Health
Numpad 2: Unlimited Armor
Numpad 3: Quick Fix
Numpad 4: Unlimited Underwater
Numpad 5: Add Money
Numpad 7: Add XP
Numpad 9: Indestructable Vehicle
Numpad 0: Unlimited Ammo
Numpad /: No Reload
Numpad *: Unlimited Grenades
F1 Key: Invisible
F5 Key: Unlock Shop Items
F7 Key: Instant Tag Enemies
F8 Key: Super Accuracy/ No Recoil
F9 Key: No HUD in Game
Numpad 1: Unlimited Health - this will maximize your health and keep it locked there. It may flash to indicate it is full. Most things cannot kill you while this is on.
Numpad 2: Unlimited Armor - this will maximize your armor and keep it locked there if you have Armor.
Numpad 3: Quick Fix - this is an alternative to leaving health on at all times. When you press this is repairs any damage and refills your health to the current maximum as well as repairing your armor. This is for those who don't like the unlimited health and unlimited armor on at all times.
Numpad 4: Unlimited Underwater - while this is on you can stay under water as long as you like.
Numpad 5: Add Money - make sure to press the ESC key to enter the menu at least once to display your current value. Each press adds more as well as increasing your maximum value. You may have to leave the menu and come back to see it has increased.
Numpad 7: Add XP - make sure to press the ESC key to enter the menu and then enter the Skills window at least once to display your current value. When you press this key, it will add 1000 more XP. When you earn the next XP legitimately, you will level up and earn another skillpoint. You may have to leave the menu and come back to see it has increased.
Numpad 9: Indestructable Vehicle - while this is on, the vehicle you are currenly in or have just exited will be indestructable to most damage. You can use this to prevent damage from driving, or being hit with enemy fire. Normally eventually vehicles will explode and behave erratically while damaged. This will help prevent that. Note that this does NOT stop cosmetic damage and broken windows and etc.
Numpad 0: Unlimited Ammo - while this is activated, most weapons and some of the special items such as C4 will not deplete when you reload or use them.
Numpad /: No Reload - many weapons and some items can be fired or used over and over without having to reload them or run out.
Numpad *: Unlimited Grenades - many explosives and throwable objects such as grenades can be used without running out of them.
F1 Key: Invisible - this is a very useful option. While this is activated many enemies cannot see you. They may hear or react to things around you but they cannot see you. Some animals can still smell you and hear you, but most of them will not attack you either. This is very useful for stealth missions or picking apart the enemy or getting around without being bothered by annoying enemies.
F5 Key: Unlock Shop Items - some shop items such as certain maps, specialty items, and also the signature weapons are not available for purchase without certain requirements or certain parts of the game being unlocked. This will make them available immediately and you can purchase them without requirements.
F7 Key: Instant Tag Enemies - another super useful option. When you press this key, the enemies in the immediate area are automatically tagged and displayed and followed. No more wondering if there are enemy in the area, where they are, and keeping up with them. You can use this also for certain special missions where the 'target' is identified with a separate icon when tagged. Now you can determine quickly where the target is with a single keypress. This will not flag animals. It only works on mostly human AI characters. You need to press again each time you move into a new area or want to know if anything is around you currently.
F8 Key: Super Accuracy/ No Recoil - two options in one! I combined these to save you from having to mash more keys. For many weapons this will remove the jarring when you shoot and will make the gun fire nearly perfectly straight with more accuracy.
F9 Key: No HUD in Game - to use this, toggle it ON while you are in the game and can see the HUD. Do not turn this ON at the main menu. Also if you enter a menu or exit the game back to the main menu and the menu won't appear, press this key again to toggle it OFF so that it will display the menu. You can now toggle this off and on at will and it will display or not diplay the HUD.
Unlock more trainer options including updates from here - Far Cry 3: Blood Dragon Trainer