NOW WITH CHALLENGE MODE - challenge other players to see who can go on the biggest zombie killing rampage. Every zombie must die! Enter their caves and kill everything that moves including giant pet spiders, deadly bosses, the Spider Queen and Zombie King. You have awesome zombie bursting guns to play with, so let the hunt begin and enjoy! - Amazing 3D graphics - Different cave maps to explore - Loads of weapons to choose from - Deadly zombies and bosses to defeat - Challenge other people and level up Source: The Developer Website.