This guide lists all the Universal Tower Defense codes you can use to earn free Gems and Trait Rerolls, as well as how to ...

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All active Universal Tower Defense codes for Gems and Trait Rerolls.

Redeeming your Zombie Invasion Tower Defense codes is actually a very simple process. It involves just a few taps of the screen, so you can do it as soon as you first start playing the game. Here’s ...

Looking for free Gems or Trait Rerolls to strengthen your team in Universal Tower Defense? Redeem these codes!