7. "The Slip" (2008)

Feels a bit less polished than other releases, but at least Reznor finally split from his "five years between albums" M.O.

Key tracks: "Echoplex," "Discipline"

Fun fact: Like Ghosts, it was released online without prior notice; an accompanying note from Reznor read, "This one's on me." Your move, Radiohead!

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