Ancient Retribution

Ancient Retribution is a placeholder mod which is used by DE for testing.

Glitch Phenomenon
Ancient Retribution is well-known for its' appearence in Endless Defense and Interception missions. How this glitch occurs remains unknown.

"For some reason endless defense has an inclination to break completely and show this Ancient Retribution thing right after a major patch", Digital Extreme claims.

Glitch Caused
This glitch only appears in a wave-based reward interface. In the event that this glitch occurs:

There are rare occasion where the timer box is empty, with both options rewritten with "RANDOM MISSION". In the case of this occurence, it is impossible to click either options, and instead the game will start the next wave with the reward interface in the way.
 * Claiming the mod will finish the mission, but will not actually reward it . Sometimes this action will crash the game.
 * Continuing the mission will dismiss the reward interface and the mission will continue normally, this glitch may repeat itself in the same session.