they began to utilize guitars and more sounds derived from heavy metal music, with the release of their album I and the EP Tribute to Metallica, which consisted of covers of Metallica songs. Combining electronic and metal elements was a pioneering move that led to a number of other bands using the electronic/metal combo as a template in keeping with a deeper industrial sound. The band continued in this vein through the 1990s, releasing II – The Final Option (with the album cover influenced by Deep Purple's Machine Head) in 1993. A more experimental and pensive III – Odyssey of the Mind followed in 1995. After the release of the heavier groove metal-influenced album Paradise Now in 1997 (unofficially known as IV), the band disbanded. Jürgen Engler founded the project DKay.com in 1997 after the break-up of Die Krupps and released two albums, Decaydenz (2000) and Deeper into the Heart of Dysfunction (2002). Reunion and later years (2005–present) Die Krupps celebrated their 25th anniversary with appearances in some major European festivals as well as solo appearances in 2005 and 2006. In fall 2007, two greatest-hits albums were released to celebrate the 25th anniversary of Die Krupps: Too Much History – The Electro Years Vol. 1 and Too Much History – The Metal Years Vol. 2, both in digipak format. Both albums were combined as the 2-disc Too Much History. A collection of completely recorded old classics including four then new songs on their greatest hit album Too Much History (2007). "The Great Divide", "5 Millionen" with two cover songs "Ich bin ein Ausländer" by Pop Will Eat Itself and "Der Amboss" by Visage (which was originally released two years before as a B-side to the re-release of Wahre Arbeit, wahrer Lohn). The influential back-catalogue of Die Krupps has been remastered and expanded. So far four of their previous albums; Stahlwerksynfonie, Volle Kraft voraus, I and Final Option have been re-released. Volle Kraft Null Acht was released in 2009, which is a remix album of Volle Kraft voraus! In 2010, Die Krupps released an EP entitled "Als wären wir für immer", which comprises two original electronic based tracks, two original metal based tracks, and a cover of Propaganda's 1980s hit "Dr Mabuse". At that time the first true new material since 1997. To celebrate thirty years of "True Work, True Pay" Die Krupps announced a joint European tour with Nitzer Ebb