The third chapter in Harry Potter and the Deathly Hallows Part 2, the video game, takes place inside Hogwarts.
Harry, Ron and Hermione entered the school using the secret passage from Hogsmeade and they continue their search for the next Horcrux.
The following guide explains how to complete A Problem of Security and where to find all collectables in this level.
It is a step-by-step game guide and the third part of the full Harry Potter and the Deathly Hallows Part 2 game walkthrough.
Since Dumbledore died, the new Headmaster is Snape who eventually realizes that Harry is inside Hogwarts. The chapter starts with a cutscene showing Harry Potter and one of his biggest enemies, Snape.
When the cutscene ends, players will have to defeat Snapes loyal friends: Amycus and Alecto Carrow.
Objective 1: Defeat Amycus and Alecto Carrow
Amycus and Alecto Carrow are two powerful Death Eaters, and they will cast Protego all the time.
During the fight make sure you destroy Amycus and Alectos shields first and use Stupefy after.
One unlockable is behind you, in the hall, to the left, while facing your opponents. It is the Amycus character unlockable. Pick it up.
The second unlockable is to the right, in the middle of the hall. It is the Wandering Part 3 Mystery. Make sure you cast Protego all the time, if you want to reach this spot.
Try to focus your attacks on Amycus and after you defeat him, use the same strategy to kill Alecto.
Your Protego can help you a lot against their spells, especially because there are no other objects in the hall that can be used to take cover.
Protego, Expelliarmus and then Stupefy, is the order that you must follow if you want to defeat Amycus and Alecto Carrow.
After they vanish, approach Snape and get ready to fight him.
A custscene will start.
Objective 2: Stand your ground against Professor Snape
Watch the cutscene and make sure you are ready to play as Professor McGonagall.
For reaching this point in the game, you will unlock Magical McGonagall trophy/achievement.
The third unlockable is at the end of the hall, behind Snape. It allows you to unlock the challenge called A Problem of Security. Cast Protego to avoid Snapes spells and pick it up.
The fourth and last unlockable is on the right side of your starting position, but it will appear only after you pick up the third collectable. The last unlockable is Alecto.
When you fight Snape, keep in mind that he can break your Protego Spell. You must cast another one as soon as you can.
This fight also unlocks a new spell: Expulso. It is a powerful offensive spell and you must cast it when Snapes shield is down.
Stay alert because from time to time, Snape also throws benches at you, and you must complete a series of quick events. Tap the buttons that appears on your screen to break the benches, than continue your attacks on Snape.
When Snapes health drops, he teleports on higher platforms inside the main hall and he will throw potions at you. Stay away from them because you will take damage. Move around all the time and keep your Protego shield up.
After you defeat Snape, you will unlock the Snape Shacked achievement/trophy and the chapter will end.
Watch the cutscene and get ready to play the next chapter called The Basilisk Fang.