First is the Novice Mode, which makes the alien less aggressive and more easily distracted. This mode also adds more resources as well as makes humans and Synthetics less bothersome.
Then, it’s your Nightmare Mode, in which your motion tracker has a damaged display and is undependable. In addition, you won’t be able to access map systems. The humans and synthetics will be pure killing machines. Let’s not forget the Alien – in this mode, it will react super quickly and be even more dangerous – “learning from your tactics with chilling speed and with intensified senses that will give you no second chances.”
Alien Isolation is available now for PS4, PS3, Xbox One, Xbox 360 and is available on Steam for PC.
Source: Xbox Achievements