As the Rat King and his new Trio of Terror-Madame Null, General Krang, and Baxter Stockman-unleash the Armageddon Game on the denizens of New York City and Mutant Town, the TMNT-under the leadership of the newly reformed Shredder-turn to allies old and new to help them in their desperate quest to stop the Rat King's nefarious plot. Karai, Casey Jones, April O'Neil, Nobody, Alopex, Bludgeon, and Venus-each play an important part in the apocalyptic contest for the world. But can this coalition withstand the Rat King's latest gambit… or will a new and unexpected alliance form in its wake? Collects issues #1-6.