Then I recommend you familiarise yourself with their music. As a guide, their first few albums were typical of a lot of thrash that seemed to be around at the time whist still creating a distinctive Kreator sound, but the nineties period they tried to get away from this and they turned out stuff that was sometimes Maidenesque (Isolation) and occasionally there was the use of keyboards to create an industrial sound (Lucretia). Some of the nineties stuff is my favoured period of theirs.
Some the 2000's, they went back to a more aggressive sound but they still had the maturity in the songwriting the developed during the 90's. Their latest offering "Enemy of God" is a very good album.
Great band - the best German band ever.