The Doomsday Heist is a content update released on December 12, 2017. It introduced a three-act sequence of heists, involving preparations and setups before undertaking finale in each act. Also, eight new achievements have been added to GTA Online, including Criminal Mastermind challenge, known from original Heists update. It earned its popular status by a massive cash bonus granted upon completing the challenge. In the aforementioned update, this challenge can be completed three times – depending on the amount of players involved in it. By clicking link below, you’ll be redirected to Google document, in which you can find a complete guide on how to complete all three of these demanding challenges.