UMUR "Gammacide 91" is a demo release by US, Arlington, Texas based thrash metal act Gammacide. The demo was independently released in 1991. Unlike most demos, this one was released after Gammacide had released their debut full-length studio album "Victims of Science" through Wild Rags Records in 1989. Unfortunately Gammacide didn´t have a label deal for their second album, and therefore had to record a demo, which they originally only send to press and labels. They didn´t succeed though and disbanded in 1992. The four tracks from this demo are now available as bonus material on the 2005 CD reissue of "Victims of Science".

If you´re familiar with the raw, aggressive, at occasionally rather brutal type of thrash metal Gammacide played on "Victims of Science", the sound and musical style on the four tracks on the 20:03 minutes long demo won´t be a surprise, as it´s more or less a continuation of said sound and style. The sound production is a bit more dark, but no less professional than on the debut album, and the music is just as furiously fast-paced and aggressive. The tracks are slightly longer than on the debut album, and the extra playing time provides them with a bit more room for variation, although that´s a relative term when speaking of Gammacide.

It´s a high quality demo through and through. High level musicianship, a well sounding organic production, and a clearly defined songwriting style, which is slightly one-dimensional, but very effective and delivered with great passion. As the case was on "Victims of Science", lead vocalist Varnam Ponville has a voice and delivery, which is probably and aquired taste, and his singing style drags my rating down sligthly, but it´s not because he can´t sing, or doesn´t deliver his vocals with passion, it´s a matter of voice and singing style. A 4 star (80%) rating is deserved.