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:
Numpad 0: Add Mission Zombie Kills
Options:
Numpad 1: Unlimited Health
Numpad 2: Unlimited Vehicle Health
Numpad 3: Unlimited Buddy Health
Numpad 4: Invisible to Zombies
Numpad 5: Unlimited Stamina
Numpad 6: Weapon Durability
Numpad 7: Unlimited Ammo
Numpad 8: Add PP Points
Numpad 9: Add Attribute Points
Numpad 0: Add Mission Zombie Kills
Numpad .: Reset Day Countdown
Numpad /: Make Daytime
Numpad *: Make Nightime
Numpad +: Easy PP Trials
Notes:
Numpad 1: Unlimited Health - toggle on for unlimited health.
Numpad 2: Unlimited Vehicle Health - toggle on for unlimited vehicle health.
Numpad 3: Unlimited Buddy Health - toggle on for unlimited buddy health.
Numpad 4: Invisible to Zombies - toggle on and zombies cannot see you or your buddies.
Numpad 5: Unlimited Stamina - you have unlimited stamina.
Numpad 6: Weapon Durability - toggle on and while using weapons they will not break.
Numpad 7: Unlimited Ammo - toggle on and most weapons will have 99 ammo.
Numpad 8: Add PP Points - make sure to look at your Inventory first. Each press adds 500 more points. You will need to earn PP normally to level up. It's probably best to not add more PP than the current Level is supposed to have to prevent skipping the level up activation.
Numpad 9: Add Attribute Points - make sure to look at your Inventory first. Each press adds more.
Numpad 0: Add Mission Zombie Kills - Each press adds more. You will notice the number is larger when you kill zombies. Note that this is for the current streak of kills you are on and not necessarily your grand total of Zombie kills.
Numpad .: Reset Day Countdown - There is a countdown timer from the time you start the game, which gives you around 6 days before the game runs out of time. Use this option to reset the timer for unlimited play time. This will allow you to do more side missions and etc.
Numpad /: Make Daytime - press this key to instantly make it Noon.
Numpad *: Make Nightime - press this key to instantly make it Midnight.
Numpad +: Easy PP Trials - to use this, toggle the option on, then press F2 to enter the Inventory and then select PP TRIALS. Note that the values have increased to JUST BELOW the amount that would be needed to complete the trial. Make sure to scroll down to see all the trials to make sure it has affected them all. Toggle the option back off. Note, for instance, that for the SLIPPERY CUSTOMER trial, you will have 49/50. You will next only need to do ONE MORE escape to complete the trial. Note that you can also do this to REPEAT trials over and over to earn massive PP quickly and to level up quickly.