Metalcore is a descendant of
Hardcore Punk with elements of Extreme Metal.
Metalcore bands represent the ideology of the
Hardcore scene with the music of Extreme Metal. The lyrics occupy with politic and personal subjects contrasted to the more into violence occupied lyrics of Extreme Metal bands. The music of
Metalcore is often characterized by hard guitar rifs with scream- vocals and melodic parts with clean- vocals. Another remarkable stylistic device is the using of break-downs which means very slow rhytm parts.
DEATHCORE
Deathcore is a modification of Metalcore which is using more
Death Metal elements. The "inventors" of
Deathcore are bands like
Despised Icon,
All Shall Perish and
The Red Chord. Those bands began to use more
Death Metal elements to change the sound.

ALL SHALL PERISH
German Metalcore bands
There are a lot of Metalcore bands, some of them are from Germany.
German Metalcore bands: