Here is how to complete the hack Stark Robots at Stark Industries Season 4, Week 4 Fortnite Challenge.
One of the challenges you need to complete for Week 4 of Fortnite Chapter 2, Season 4 is to hack Stark Robots at Stark Industries. Stark Industries is a location that was added in the 14.10 update and you can easily find this location as it is a named POI that can be found on the map. If you haven’t discovered it yet, you can find it where Frenzy Farm used to be.

How to Hack Stark Robots in Fortnite
At the Stark Industries, you will find Stark Robots, which is similar to the Henchmen last season. In order for you to hack one of these robots, you will first need to find a weapon and then knock one of the robots. As soon as you have done this, you will need to go to the robot and there you will see an option to hack, which was shakedown for the henchmen previously.
Be sure you only knock the robots and do not eliminate them as this will not count to the challenge. You will be notification of “Knocked down Stark Robot” on your screen so you will know when you push and hack.

Once you have hacked the Stark Robot, it will fight with you instead of against you. In order for you to complete the challenge, you will need to hack a total of 5 robots, but you can only have 3 hacked at the same time.
You will be notified when you have completed the challenge on the left side of your screen and you will be granted 25,000 XP. Watch out for Iron Man when you are at Stark Industries as he can kill you with one fatal blow!