UMUR
"Rigor Mortis" is a posthumous single release by US death metal act Rigor Mortis. By the time of it´s release Rigor Mortis had changed their name to Immolation. The single was relased through Seraphic Decay Records in July 1990.
The "Rigor Mortis" single features two tracks. The first is "Holocaust" which is taken directly off the "Decomposed" demo (recorded in July 1987). The second track on the single is "Warriors of Doom", which at the time was an unreleased demo track recorded in November 1987. Both tracks are examples of early US death metal with a raw thrash metal influence. The single is a rare collector´s item, but both tracks are more readily available on the Immolation compilation album "Stepping on Angels... Before Dawn (1995)".
So while the quality of the music is on a good level, I´d probably think twice before seeking out this rare collector´s item and get "Stepping on Angels... Before Dawn (1995)" instead. A 3 star (60%) rating is warranted.