Purifier badge is achieved by destroying enemy Resonators.

Purifier badge has 5 tiers and each tier has a required number of resonators to achieve it.

  • Bronze – 2000 destroyed resonators
  • Silver – 10000 destroyed resonators
  • Gold – 30000 destroyed resonators
  • Platinum – 100000 destroyed resonators
  • Onyx – 300000 destroyed resonators

Here are all the badges:

And Purifier badge info:

purifier-info