In Zombie Last Defense 4, it's harder to defend yourself because zombies are now coming from both sides.
In Zombie Last Defense 4, a new defense is added. This time, it's harder to defend because zombies are now coming at you from both sides. But there are now new weapons that are stronger and bonuses, and a fourth player has joined the game. You have to stop the waves of zombies from getting to your castle or it will fall. If this is your first time playing the game, choose "Normal" for the level of difficulty. The goal is to keep the zombies away from the building, no matter how many people are playing. You win the game if you make it through all 12 waves.
Have fun and good luck!