Kill 'em All is a very different album than Metallica's new one's. It is very heavy and has lots of gituar solos. Dave Mustaine (Megadeth) co-wrote several of the songs on this album. It was originally intended to be titled Metal Up Your Ass but, the record company would not allow it. Originally released on Megaforce Records in 1983, it was re-released by Elektra Records in 1986.