You can decapitate zombies for a quicker kill. This works best with the Shotgun (the Magnum does it too, but you'll want to save your Magnum for boss battles). When a zombie comes after you, let them get close, and then point your Shotgun up and fire. This should decapitate them. However, the Shotgun does a good job at decapitating from a distance, too, which is what you should try to do if you are facing groups of zombies. Only use the pointing up method for lone zombies that you need to kill.
Herbs - all possible combinations and their effects
Added 17 Dec 2009, ID #8983
There are three types of healing herb found in the game - Green, Red and Blue. The below chart will list the the possible combinations and effects of each:
Green - Restores 25 percent of health Green + Green - Restores 50 percent of health Green + Green + Green - Fully restores health Red - No effect alone Green + Red - Fully restores health Blue - Cures poison Green + Blue - Restores 25 percent of health and cures poison Green + Green + Blue - Restores 50 percent of health and cures poison Green + Red + Blue - Fully restores health and cures poison
Note - No more than three herbs can be combined together. Therefore, it is not possible to combine three Green herbs and a Blue herb. Also, Blue herbs cannot combine with Red alone.
Note 2 - First Aid Sprays, the only other healing item found in the game, fully restores health.