Integrity - Those Who Fear Tomorrow (1991)
One of the first Metalcore bands, and perhaps the first to receive some real success, Integrity take a pretty standard Hardcore Punk approach and add some mean Crossover Thrash riffs and all around Metalcore heaviness. The vocals are transitioning from punk yells to the growls that inhabit metal. Lyrical themes are dark and the mood is a straightforward, angry bundle of energy.
The album is pretty damn simple and consistent, and with 15 tracks they all blend together by the end. Integrity do slow it down a fair bit which adds some variety, but for the most part every song sounds the same. No problem if you want some great Metalcore from the genre’s inception, but it's still a very primitive form of what the genre would become.