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The game picks up in the year 2047 in New York City with Alcatraz still occupying the late Prophet's Nanosuit 2.0; Prophet's role in the story is said to be greater than in Crysis 2, according to Crytek. The area is thick with vegatation and remains of dead Ceph technology. Meanwhile, a large Nanodome created by CELL appears over New York City. The purpose of the Nanodome is to protect the city from any remaining Ceph
forces and to keep any humans out; it also serves as a cleansing
solution to any Ceph pollution. Another primary purpose of the Nanodome,
however, is for CELL's attempt to conquer the world through weapons and
technology.[2]