Udie you are thinking of Garage Days Re-Revisited, which was released after Master of Puppets. The Re-Re part is important, I reckon.
The Metallica album before Kill em All?
Beats me. Maybe the promo, "No Life Til' Leather"
Metal Up Your bellybutton was the original title for Kill 'Em All, but never released with the original name.
Regardless, for the all intensive purposes, and the definition that really stands up to this thread, Kill 'Em All was Metallica's debut album.
Not sure what Saurdaukar is smokin'.
I am hesitant to throw this out amongst the metal heads...
but Pearl Jams' "Ten" was a pretty good debut album. I saw them open for Alice in Chains in a small club in Portland, well before grunge hit big. Grunge would not have been so bad had it not exploded onto every single radio station. lol
-Kekule