"Fire at Zombies" city wall upgrade guide

php editor Xigua brings you the city wall upgrade strategy of "Fire at Zombies". In this exciting tower defense game, city wall upgrades are a crucial part. Through reasonable city wall upgrade strategies, players can effectively resist zombie attacks and protect the safety of the base. This guide will give you a detailed introduction to the techniques and methods of city wall upgrades to help you achieve better results in the game. Let's work together to improve the defense of the city wall and repel all zombies!

"Fire at Zombies" city wall upgrade guide

The city wall needs to be unlocked after clearing the designated level. The upgrade is divided into two parts: city wall and skills.

Initial castle skills:

Level 1, cooldown for 60 seconds when monsters are close

Level 3, reduce damage taken by city walls

Level 5, fire protection under the city

Level 7, enhanced protection

Level 9, monsters that attack the city wall at close range have a probability of being damaged.

Unlocking conditions:

City wall level 10, 30,000 gold coins

Level 11, cooldown 40 seconds

Level 13, Throwing missiles

Level 15, long-range attack on the city wall has a probability of rebound

Level 17, launching a powerful attack at the beginning

Level 19, the probability of damage when receiving damage is 0

Physical value

Unlocking conditions: City wall level 30, 120,000 gold coins

Level 27, laser wall under the city

Level 29, attack Monsters on the city wall may be teleported to level

31, and the cooldown for monsters approaching is 60 seconds.

The defensive line has 6 appearances, each with its own skills. Taking the initial defense line as an example, level 9 mines are deployed and the damage is 400%. Upgrading consumes infrastructure consumables. All skills are unlocked at level 108, and breakthroughs can be achieved at full level (consuming infrastructure melt powder).

Defense line selection: It is difficult to fully unlock ordinary defense skills, and it is more difficult to activate the appearance defense line. After accumulating strength, you can choose between the first two walls.

Most players may choose Doll Castle, but Iron-Blooded Fortress is more recommended. Its skills have high early output (300% damage) and knockback (1M).

Maximum skills can turn the tide of the battle at critical moments! Monsters are close to the defense line and can be easily repeled with fuel bombs or hail generators.

Ultimate choice: Krypton gold players can choose Dragon Flame, which squeezes the monster in the middle from both sides to cause damage, and has both defense and attack.

Summary: The line of defense is important, and a strong line of defense helps success. Zero krypton players accumulate more consumables and melted powder, and can buy them with diamonds when necessary.

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