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Hansi participou destes álbuns, nas seguintes músicas (ordenadas cronologicamente):
* [[Gamma Ray]] - [[Land of the Free]] - "Farewell" (1995)
* [[Grave Digger]] - [[Tunes of War]] (1996, backing vocals only)
* [[Nepal]] - [[Manifiesto]] - Besando La Tierra, Estadio Chico (1997)
* [[Iron Savior]] - [[Iron Savior]] - "For The World" (1997)
* [[Edguy]] - [[Vain Glory Opera]] - Out of Control, Vain Glory Opera (1998)
* [[Grave Digger]] - [[Excalibur]] (1999, backing vocals only)
* [[Therion]] - [[Deggial]] - Flesh of the Gods (2000)
* [[Rage]] - [[Unity]] (2002, backing vocals only)
* [[Angra]] - [[Temple of Shadows]] - Winds of Destination (2004)
* [[The Arrow]] - [[Lady Nite]] - Never Say Never
* [[Ljósálfar]] - [[Ljósálfar]] - Forevermoor
* [[Nuclear Blast All-Stars]] - [[Into The Light]] (2007) - Slaves To The Desert
* [[Ayreon]] - [[01011001]] (2008) - credited as Celtic Cross symbol: Age Of Shadows, Beneath The Waves,
Newborn Race, The Fifth Extinction, Unnatural Selection, River of Time, The Sixth Extinction
* [[Dreamtone & Iris Mavraki's Neverland]] - [[Reversing Time]] (2008) - To Lose The Sun
* [[Van Canto]] - [[Hero]] (2008) - Take to the Sky
* [[Aneurysm]] - [[Shades]] (2008) - Reflection
* [[Solar Fragment]] - [[In Our Hands]] (2011) - Inside the Circle
* [[Grave Digger]] - [[Ballad of Mary]] - Rebellion 2011
=={{Ligações externas}}==
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