Eliminate Doctor Doom in Doom's Garrison
The stronghold of Fatalis replaces Pleasant Park, so you will have to take the direction of this city, which is located as a reminder to the northwest of the Authority. Then, when you are there, you will have to get your hands on this famous Fatalis, a relatively powerful NPC that you will therefore have to eliminate. Go below the football field to get your hands on it. It seems that Doom can also be found in his mansion, north of the city, in some parts.Make sure you have a weapon worthy of the name, then go face him, beware of his overpowered attacks. For the challenge to be validated, you will have to repeat the operation three times. Once eliminated, he drops, in addition to his weapons, the access card to the safe, at the bottom of the secret base under the football field.