Guard Tower

The Guard Tower unlocks after clearing Stage 5-10.

Protect your borders and earn buffs and Heart Keys at the Guard Tower!

Protect

When you enter the Guard Tower, you will be in charge of manning five guns.

To activate a gun, you will use the heroes of your friends or guild members who have played in the last seven days. You need at least two heroes of Epic or higher rank that fit the hero type indicated on the gun. Learn more about hero types in Undead World: Hero Survival.

When a gun is selected, you can see the hero type required, the current level, which heroes are manning it, and all the possible levels. 

The fourth gun requires AOE heroes. Currently, only Britney is assigned to man the gun, but at least two heroes are required, so the gun is still off and at Level 0.

Scroll through the different levels at the bottom to see how many heroes at certain ranks are needed to reach that level and activate the accompanying buffs. The buffs apply to your own heroes who match the heroes currently manning the gun that triggers the buff.

Defend

When your friends need help to defend their borders, they can borrow your heroes. You do not lose access to that hero or experience any negative effect for defending your friends' and guild members' borders. You also do not need to approve your friends' use of your heroes; they will automatically start defending once your friend chooses them. To see which heroes are currently defending other Guard Towers, tap on the DEFEND button.

When a hero is defending a Guard Tower, they will appear with a rate of X/H. The X will be how many Heart Keys a hero is generating each hour. You can get up to 2100 Heart Keys per hour. You can see your current rate at the top of the screen.

When you have enough Heart Keys, you can trade them in for Reward Boxes and earn Hearts. Learn how to use Hearts to recruit heroes in Undead World: Hero Survival.