Your first new task is to investigate the body of the killer, who died in an unfortunate turn of events during his attempt to attack the main character. As in all similar scenes, you need to correctly scan a number of interactive areas and objects (rely on the EM Vision and Bio Vision modes, since they will allow you to find different traces).
Specifically, you need to scan the unprotected wires, prostheses and implants inside the killer's body, as well as the electric burns on the body, and a very well hidden puncture wound that is shown in the image above.
Leave the brain implant until the very end, which will allow you to hack the mind of the killer (Victor Maderski). After a while the first memory will be loaded.
Begin your journey through the assassin's mind by reaching the courtyard. Approach the children with TVs instead of their heads, which will allow you knock down the largest character. Then go into the building and start to follow the new linear path. The march should not cause you any problems at first and a white deer will appear regularly to show you the way, which is an additional facilitation. When you reach the position shown in the picture above, cause the large shelf to shift to the left, so that a hole in the wall is open, allowing one to squeeze through.
Further memories force you onto a linear march again, also when you are in the woods again for a while. When you return to the forest in the further part of the nightmare, ignore the strange creatures that will start to appear in the area, because there is no risk of the hero's struggle ending prematurely.
You will only need to be vigilant upon reaching the place shown in the picture above, because an already familiar monster is located here and being detected can lead you to a Game Over screen. Sneak inside the building, keep in mind the hiding behind curtains and crouch even before you start sneaking around. The final few memories are once again very linear and you do not have to perform any special actions while completing them.