UMUR "Mutant Supremacy" is the third demo release by US, Buffalo, New York based thrash metal act Tirant Sin. The demo was independently released in 1988. It´s the successor to the October 1987 demo "Chaotic Destruction" and there´s been one lineup change since the predecessor as lead vocalist Dennis John Glinski has been replaced by Chris Barnes. Barnes was actually a founding member of Tirant Sin, but he was only shortly in the band in 1985.

The addition of Barnes to the lineup means that "Mutant Supremacy" features three future members of Cannibal Corpse in the lineup in Barnes, Paul Mazurkiewicz (drums) and Bob Rusay (guitars). Tirant Sin would soon fold and along with some members of fellow Buffalo thrash metal act Beyond Death, the three above mentioned members of Tirant Sin would form Cannibal Corpse.

Stylistically there´s nothing on "Mutant Supremacy" which points in the direction of death metal though, as this is through and through aggressive and brutal thrash metal, just as the band also played on the first two demos. Barnes performs screaming throaty vocals which are completely different from the growling vocals he would start performing just a year down the line.

The sound production on the demo is raw and unpolished but it´s decent enough and you´re able to hear all details. Just as the case was on the first two demos the songwriting is what holds Tirant Sin back. It´s not awful or anything like that, but it´s very standard for the genre, and the tracks aren´t particularly memorable. A 2.5 - 3 star (55%) rating is warranted.

UMUR "Chaotic Destruction" is the second demo release by US, Buffalo, New York based thrash metal act Tirant Sin. The demo was independently released in October 1987. It´s the successor to the February 1987 demo "Desecration of the Graves" and there have been a couple of lineup changes since the last release, as guitarist Cam V. has been replaced by Joe Morelli and vocalist Dennis John Glinski has been added to the lineup to make Tirant Sin a quintet on this release. The vocals on the first demo were handled by bassist Rich Ziegler and drummer Paul Mazurkiewicz, and a permanent and more professional sounding solution was needed.

Tirant Sin formed in 1985 under the Satan´s Angel monicker but soon changed their name to Tirant Sin. Tirant Sin released three demos before morphing into Cannibal Corpse along with members of another Buffalo thrash metal unit Beyond Death.

Stylistically "Chaotic Destruction" continues the aggressive and brutal thrash metal style Tirant Sin initiated on "Desecration of the Graves" but it´s audible that the band have honed their playing skills and that the addition of a "real" singer have boosted their sound. "Chaotic Destruction" also features a better sounding production than the first demo, and overall it´s the step up in quality you´d expect from a sophomore release. The songwriting is still very standard for the genre though, and it´s in that department that "Chaotic Destruction" doesn´t do anything out of the ordinary. A 2.5 - 3 star (55%) rating is warranted.

UMUR "Desecration of the Graves" is the first demo release by US, Buffalo, New York based thrash metal act Tirant Sin. The demo was independently released on cassette tape in February 1987. Tirant Sin formed in 1985 under the Satan´s Angel monicker but soon changed their name to Tirant Sin. Tirant Sin released three demos before morphing into Cannibal Corpse along with members of another Buffalo thrash metal unit Beyond Death.

Stylistically this is aggressive and brutal thrash metal influenced by Slayer and also the contemporary German scene. The four tracks on the 11:42 minutes long demo are pretty standard for the genre, but still pretty solid. It´s obvious the band are pretty young and immature at this point (especially the vocals), but when that is said "Desecration of the Graves" is overall decent enough. The sound production is raw and unpolished, but it´s not unlistenable. A 2.5 - 3 star (55%) rating is warranted.