The Dark Ones have been trying to make contact, unable to communicate with the human survivors within the metro in a meaningful way, before they found Artyom. As they do, Artyom has a vision, which relates to the dreams and nightmares that he has been having. After a brief re-union with Sukhoi, Artyom reaches the tower and his team provide the missile site with the location of the Dark Ones hive. On the way, they stop at VDNKh, which has been almost overrun by Dark Ones. The majority of the group go to the surface and the missile silo, while Artyom is accompanied back through the metro so that they can provide targeting co-ordinates from a suitable location, Ostankino Tower. Several are killed before they explode a tank of fuel to distract it. The team pass through the metro station leading to the Kremlin, which contains a mutated bio-weapon that attempts to hypnotize and consume them. They are rescued by Melnik and a squad of fighters and they escape into Metro-2, a secret set of tunnels that lead to the missile site. Artyom and the child's father are abducted by a tribe of cannibals who worship 'The Great Worm'. Melnik leaves Artyom at the station while he goes to collect reinforcements but whilst he is away, Artyom becomes involved in the search for a missing child. Artyom and Melnik flee without the book and re-enter the metro, arriving at station Kievskaya. It is an envelope containing directions to a functioning missile silo. Daniel is mortally wounded, but before dying, gives Artyom his reward anyway. They enter the library and are attacked by the 'librarians', mutated creatures that reside there. Artyom travels to the surface with Melnik and young Brahmin called Daniel. They offer a solution to the threat of the Dark Ones in exchange for Artyom's help in recovering a sacred book, as they believe him to be psychically sensitive. Although Polis do not agree to intervene, a faction known as the Brahmins (who consist of scientists and academics who collect books from the library above), contact Artyom.

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