Assaultrons are among the most infuriating bots you face in Fallout 4. The only thing more deadly than these black robots are the Sentry Bots, but we’ll get to those in a bit. Assaultrons are fast and powerful at both close and long range. As soon as they spot you they will start running towards you. As with most things, you’ll want to take out its legs, which is much easier said than done.
The armor on Assaultrons is very tough. On top of that, they will close the distance really fast. Their melee attacks knock you down and shake up your screen, making aiming extraordinarily difficult. V.A.T.S. will help to a degree, but you’ll want to keep dancing around if possible until you get a leg off. That will take care of half the threat.