Corrupter Badge
Description
You prevented a Non-Aggression pact between the Circle of Thorns and Nemesis.
How to Get
Earn the Corrupter accomplishment badge by completing the Stop Circle from Signing Pact mission from Neal Kendrick or Tina Chung.
In Ouroboros, as a Flashback mission, you must complete the "Stop the Pact" mission in the Defender of the Truth (Level 30-34) section.
Gladiator Badge Unlocked
When you earn this badge, you will unlock the Nemesis Soldier Gladiator badge.
Notes
For the literary pedants out there, they will notice there are two valid spellings of the origin word "Corrupt" - both corrupter and corruptor are valid uses with the same definition. It appears however that Corruptor refers almost exclusively to the City of Villains Archetype, the Corruptor, while the use of Corrupter seems limited to this badge only.