1. The Surge Achievements
2. Big Sister achievement

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Big Sister achievement in The Surge

Big Sister

Defeated the Big SISTR 1/3

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2 guides

How to unlock the Big Sister achievement

• Zasta 360GameTV

  16 May 2017 17 May 2017
  10 0 4

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  The Big Sister 1/3 has 3 phases. In the first phase you have to destroy 2 arms. The two arms attack you alternately and perform various attack techniques. During these attacks a laser will attack you from time to time. The laser goes back and forth on your current position. To avoid all these attacks, you must dodge and move. The best chance to make a hit is when an arm comes flat on the ground to your position.
  
  After you destroy both arm the second phase starts and you have to go forward. Here you will find 4 little laser cranes. This section is a little bit tricky but doable. The key is to keep calm and attack on the right moment. Go to the left or right side close to the railing and behind one laser, the laser will now attacks you, dodge and wait. The laser is spinning around and burn some extra fire and is this fire off and the laser goes back in the starting position is your time to hit the laser crane one time! Repeat this until the laser crane is down, after that switch to the other side and do the same. Now on each side is one laser down and one laser alive. With the same tactic destroy the last two laser crane and go directly to the boss and the third phase starts. One little notice, at the last laser crane, the boss will start again with the laser attack, so you have to dodge this attack also.
  
  In the third phase go directly to the back as far as it goes and attack the column / stand where the boss is located. After some hits the column / stand is destroyed and the boss is nearly permanently in front. Attack him directly and dodge the attack and heal you. I have not find really a pattern, it looks like random, so hit him every time if it possible and heal yourself.
  
  

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  Yeah, you can skip straight through the crane things. Only downside is that they can attack you if you get in front of the boss, but hanging out to the sides and behind wasn't difficult.

  Posted by Sliktor on 03 Jun 17 at 05:46

  I did the same thing, just ran through the 4 welding arms and attacked the core.

  Posted by MITCHHICKS on 03 Jun 17 at 08:11

  Turns out that skipping the cranes is also the trigger for getting the better version of the boss weapon.

  Posted by WhyattThrash on 03 Jun 17 at 09:07

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• cooper101183

  22 Aug 2017 22 Aug 2017
  9 0 2

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  I have some valuable advice that will make this battle easier and also allow you to skip the second phase of this three phase battle.
  
  Firstly go to options and turn off both Auto Lock On and Auto Switch Lock. Trust me this is a massive help not only in phase 1 but mainly 2.
  
  
  Phase 1
  This phase is all about timing. Keep to the back and angle the camera so you can see both claws. As soon as one of the claws lowers immediately jump. Don't wait for it or try and time a dodge just jump out of the way when the claw lowers. This gives you enough to compose yourself then get two hits in(1 with power weapon). Jump to the back again and now watch for the other claw.
  
  Provided you stay at the back it pretty much prevented the claws from using its other attacks.
  
  Listen out for a Lazer attack. This is a double attack. When you hear the mechanism ready to fire begin jumping. Another lazer will fire straight after so jump again.
  
  This phase is purely about timing. Don't worry if at first you get pummeled, it takes practice and understanding the movements.
  
  Ideally you should use no more than 1 or 2 health
  
  switch to your power weapon
  
  Stage 2
  Run up some stairs and you will see mechanical arms. You are supposed to destroy these, however these will eat into your health. They inflict massive damage and are difficult to dodge.
  Instead run straight to the back.
  
  Stage 3
  There is a small eye type mechanism protected by a cage. I found that if stand right underneath the eye it can't hit you. So stand underneath then wait for cage to open then hit it with your power weapon.
  
  Be careful sometimes the momentum of your swings can put you into danger however you should have enough health.
  
  According to other videos you are supposed too run from side to side of the eye. I found I lost to much health.
  
  Here is a video
  

  
  You can clearly see that as I was standing still I was not taking damage the biggest problem was the slow speed the weapon and the momentum of tree swing dragging me forward. Maybe the Vibrocutter or Staff would accutaly be more effective.

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  Great guide, thanks

  Posted by Jon81D on 25 Feb 18 at 22:56

  Hell yes. It only took my three tries thanks to this advice. I had a hard time avoiding damage under the eye, but thankfully I had enough healing injections to make it through. Nice one!

  Posted by Cellar Attic on 22 Jun 19 at 17:54