Switching on Power on this map is very different to what we have done in the past. As per usual there will be on screen markers for you to follow. Start off by spending a little time in the starting room accumulating enough points to open up the map.

You will need 2250 points to reach the first Ward. Once you have it you can choose to exit the spawn via the left or right door. It doesn't matter what you choose - I tend to head along the right door.

Open up the three doors and you'll find yourself in the Kitchens. Head on over to the Red Flag in the courtyard.

This will start a small recapture trial. A circular light will appear on the floor and it's your goal to remain in the circle for long enough to fill the meter. Once filled all the purple eyed zombies will explode.

Tips:

• You do not need to kill every zombie.
• Keeping a single regular zombie alive before starting makes the challenge much easier.
• Purple-eyed zombies will spawn during the event, but surviving inside the circle is the priority.

Once completed that will activate the Perks and Wallbuys in that area but you still have one more to do in order to open up the rest. You'll need another 2500 points in order to reach the next but when you get to the Training Area you'll just need to repeat the same process again.

Head to the Central Courtyard. You'll notice mystical glyphs sealing the entrance to the War Room. Interact with them as directed by the objective markers to remove the barrier. Once the glyphs disappear, the path forward opens.