1. Added card synthesis system
The drop of the card is dropped from the normal level;
The synthesis of cards requires currency;
Cards can be added and used in level mode;
2. Added mercenary exploration system;
After having mercenaries, on the right side of the big map, open the explore button to explore;
3. Optimized some interface UI
Sir! The zombie is coming! This is the last survival base for us!
Zombie is coming, and mankind is facing a desperate situation to become a walking dead. As the last commander of mankind, you must build a shelter to defend your people!
First you must upgrade your base to make it stronger and able to defend humans from being invaded by zombies.
Than, you must recruit some soldiers, lead them to fight back, and destroy the invading zombies.
The invasion of zombies will become more frequent and powerful. You must upgrade the defense towers, better equip the soldiers, and finally bring them Counterattack, attack the zombies' lairs, and expand the human living space.
Can you finally purify the world?
