What all was released in 2013 - That is the main question! There was bunch of good re-issues. Urashima reissuing Atrax Morgue LP's was great thing as most were better than any actual albums band did!
Long awaited debut, PUCE MARY LP was great. Cold, simple, "mechanical". Maybe different from the tapes, but something I instantly listened multiple times.
"Problem" is, that most often I listen things long after they're released. Still going through random stuff from last.. lets say 30 years. Would be curious to see whole list of what WAS released in 2013?
I think within noise/experimental, there was still lots of goodies. In rock music, highlights were perhaps LP's of THROAT, HEBOSAGIL, but I realize my view may be distorted by small exposure for the stuff. Metal year appeared kind of dry. Don't remember too many absolute highlights beyond the usual stream of stuff. Few praised albums I have yet to buy.
Big names of rock & metal & music in general => not interested.