Hartmann 2005–present •
Out in the Cold (2005) •
Home (2007) •
Handmade / Live in Concert (2008) •
3 (2009) •
Balance (2012) •
The Best is yet to Come (2013) •
Shadows & Silhouettes (2016) •
Hands on the Wheel (2018) •
15 Pearls and Gems (2020) •
Get Over It (2022) •
Twenty Times Colder (2025)
Centers •
Centers –
Fortuneteller (1997)
At Vance •
No Escape (1999) •
Heart of Steel (2000) •
Early Works / Centers (2001) •
Dragonchaser (2001) •
Only Human (2002)
Empty Tremor •
The Alien Inside (2004)
Guest appearances Vocal on song •
Die legende Lebt -
1. FCN Party Project (1998) •
Avantasia –
The Metal Opera (2001) •
Avantasia –
The Metal Opera Part II (2002) • Genius –
Episode I (2002) •
Magic Kingdom –
Metallic Tragedy (2004) •
Iron Mask –
Hordes of the Brave (2005) •
Lunatica –
The Edge of Infinity (2006) •
Avantasia –
The Scarecrow (2008) •
Heavenly –
Carpe Diem (2009) • Vindictiv –
Ground Zero (2009) •
Iron Mask –
Shadow of the Red Baron (2010) •
Avantasia –
The Wicked Symphony (2010) • Soul Seller –
Back to Life (2011) •
Avantasia –
The Flying Opera (2011) •
Dreamscape –
Everlight (2012) • PelleK –
Bag of Tricks (2012) • Beyond the Black –
Songs of Love and Death (2015) • Soulspell –
The Second Big Bang (2017) •
Serenity –
Souls and Sins (Acoustic) (2020)
Backing / Choir / Guitar •
Edguy –
Mandrake (2001) •
Rhapsody –
Rain of a Thousand Flames (2001) •
Freedom Call –
Eternity (2002) •
Rhapsody –
Power of the Dragonflame (2002) • Squealer –
Under the Cross (2002) •
Aina –
Days of Rising Doom (2003) •
Edguy –
Hellfire Club (2004) • Genius –
Episode II: In Search Of The Little Prince (2004) •
Freedom Call –
The Circle of Life (2005) •
Helloween –
Keeper of the Seven Keys - The Legacy (2005) •
Edguy –
Rocket Ride (2006) •
HammerFall –
Threshold (2006) •
Freedom Call –
Dimensions (2007) • Genius –
Episode III: The Final Surprise (2007) •
Edguy –
Tinnitus Sanctus (2008) •
Avantasia –
The Wicked Symphony (2010) •
Avantasia –
Angel of Babylon (2010) •
Magic Kingdom –
Symphony of War (2010) •
Avantasia –
The Flying Opera (2011) •
Iron Mask –
Black as Death (2011) •
Edguy –
Age of the Joker (2011) •
Primal Fear –
Unbreakable (2012) •
Avantasia –
The Mystery of Time (2013) •
Avantasia –
Ghostlights (2016) •
Avantasia –
Moonglow (2019) •
Avantasia –
A Paranormal Evening with the Moonflower Society (2022) == References ==