1982 - It may not be metal in any way but Shitlickers 7" from 1982 is brutal by todays standards. 1984 - Bathory and Death. 1985 - Mutilator - Grave Desecration demo 1986 - Sarcófago maybe. Repulsion. 1987 - Tough one. The Brazilian "league" perhaps. 1988 - Carcass or maybe Imperator'...

Black Prophecies (Ita) - Azathoth demo 1988. It would be kickass if it wasn't for the dreadful sound of it.

I think "War" and "Sacrifice" are used frequently.