World Order (2001)Skeletons in the Closet (2003) – Live albumMajestic (2005)Land of the Free II (2007)Hell yeah! – The Awesome Foursome – Live in Montreal (2008) - Live albumTo the Metal! (2010)Skeletons & Majesties (2011) – Compilation albumSkeletons & Majesties Live (2012) – Live albumEmpire of the Undead (2014) Iron SaviorIron Savior (1997)Unification (1998)Interlude (1999) - EPDark Assault (2001)Reforged: Ironbound (2022) UnisonicIgnition (2012) - EPUnisonic (2012)For the Kingdom (2014) - EPLight of Dawn (2014)Live in Wacken (2017) - Live album Hansen & FriendsXXX – Three Decades in Metal (2016)Thank You Wacken Live (2017) - Live album Guest appearances With Rampage:Love Lights Up the Night – vocals on "Life" Victims of Rock - vocals on "I Don't Wanna Be A Rock 'N' Roll Star" With Blind Guardian:Follow the Blind – vocals on "Valhalla", and guitar solo on "Hall of the King"Tales from the Twilight World – vocals on "Lost in the Twilight Hall," guitar solo on "The Last Candle"Somewhere Far Beyond – lead guitar on "The Quest for Tanelorn" With Angra:Angels Cry – guitar solo on "Never Understand"Temple of Shadows – vocals on "The Temple of Hate" With Michael Kiske:Instant Clarity – guitars on "Be True To Yourself", "The Calling", "New Horizons", "Thanx A Lot" With Primal Fear:Primal Fear – guitar solo on "Formula One", "Dollars", "Speedking" With HammerFall: I Want Out EP – vocals on "I Want Out" and backing vocals on "Man on the Silver Mountain" With Tobias Sammet's Avantasia: The Metal Opera – as "Regrin the Dwarf" he has vocal parts in "Inside" and "Sign of the Cross" The Metal Opera Part II – he reprises his role and has vocal parts in "The Seven Angels" and "Chalice of Agony" The Scarecrow – lead guitar on "Shelter from the Rain" The Flying Opera (live album) – vocals on "The Toy Master" With Heavenly: Coming from the Sky – vocals on "Time machine" With Stormwarrior: Stormwarrior – vocals & guitar on "Chains of Slavery" and "Heavy Metal is the Law" and narration on "Iron Prayers" Northern Rage – additional vocals on "Heroic Deathe" and guitar solo on "Welcome Thy Rite" With Headhunter: Parody of Life – guest appearance on "Cursed" With Heavenwood: Swallow – vocals & guitar on "Luna", and vocal on "Downcast" With Place Vendome: Close to the Sun – guitar solo on "Across The Times" and "Riding The Ghost" With Tragedian: Unholy Divine – guest appearance on