From Olsztyn, Poland

From last.fm:

Vader is a death metal band from Olsztyn, Poland founded in 1983. They stand as one of the best-known European death metal bands utilizing a style of death metal different from that of their American counterparts, but their approach is firmly based upon the template created by Morbid Angel. For example, many bands of this genre tend to play guitar solos and lead parts which do not adhere strictly to traditional musical principles and make extensive use of tremolo bar, creating a rather dissonant sound. Read more about Vader on Last.fm.