| produced |
---|
| Breakdown | assistant | Magnum | 4:00 |
| Hit and Run | assistant | Magnum | 3:43 |
| One Night of Passion | assistant | Magnum | 3:51 |
| Road to Paradise | assistant | Magnum | 3:36 |
| So Far Away | assistant | Magnum | 4:32 |
| The Great Disaster | assistant | Magnum | 3:47 |
| The Prize | assistant | Magnum | 3:41 |
| The Word | assistant | Magnum | 4:55 |
| Vicious Companions | assistant | Magnum | 3:44 |
| Young and Precious Souls | assistant | Magnum | 4:04 |
| vocals |
---|
| A Restless Heart and Obsidian Skies | lead vocals | Avantasia | 5:53 |
| All You Believe In | lead vocals | Magnum | 5:02 |
| Beneath the Waves | | Ayreon | 8:27 |
| Breakdown | lead vocals | Magnum | 4:00 |
| Can't Buy Yourself a Heaven | lead vocals | Magnum | 5:01 |
| Come Holy Men | lead vocals | Magnum | 5:02 |
| Crimson on the White Sand | lead vocals | Magnum | 4:53 |
| Cry Just a Little | guest and lead vocals | Avantasia | 5:16 |
| Farewell | guest and lead vocals | Avantasia | 6:15 |
| Hit and Run | lead vocals | Magnum | 3:43 |
| House of Kings | lead vocals | Magnum | 4:47 |
| I Won't Let You Down | lead vocals | Magnum | 3:57 |
| In Quest For | | Avantasia | 3:53 |
| Journey to Arcadia | guest | Avantasia | 7:12 |
| Lavender | guest and lead vocals | Avantasia feat. Bob Catley | 4:30 |
| Lavender | | Avantasia feat. Bob Catley | 4:30 |
| Liquid Eternity | | Ayreon | 8:10 |
| Madman or Messiah | lead vocals | Magnum | 5:17 |
| Man | lead vocals | Magnum | 5:26 |
| Newborn Race | | Ayreon | 7:50 |
| No Return | guest and lead vocals | Avantasia | 5:04 |
| No Steppin' Stones | lead vocals | Magnum | 4:10 |
| Not Forgiven | lead vocals | Magnum | 5:48 |
| On the Edge of the World | lead vocals | Magnum | 4:23 |
| One Night of Passion | lead vocals | Magnum | 3:51 |
| Remember | lead vocals | Magnum | 5:07 |
| Ride the Comet | | Ayreon | 3:29 |
| River of Time | | Ayreon | 4:25 |
| Road to Paradise | lead vocals | Magnum | 3:36 |
| Runaway Train | guest and lead vocals | Avantasia | 8:42 |
| Sacred Hour | lead vocals | Magnum | 5:32 |
| Shelter From the Rain | additional, guest and lead vocals | Avantasia | 6:09 |
| So Far Away | lead vocals | Magnum | 4:32 |
| Soldier of the Line | lead vocals | Magnum | 4:16 |
| That Freedom Word | lead vocals | Magnum | 4:53 |
| The Archway of Tears | lead vocals | Magnum | 6:21 |
| The Day After the Night Before | lead vocals | Magnum | 4:24 |
| The Fifth Extinction | | Ayreon | 10:29 |
| The Great Disaster | lead vocals | Magnum | 3:47 |
| The Great Mystery | guest | Avantasia | 10:03 |
| The Great Unknown | lead vocals | Magnum | 5:27 |
| The Last One on Earth | lead vocals | Magnum | 3:31 |
| The Lights Burned Out | lead vocals | Magnum | 4:28 |
| The Looking Glass | | Avantasia | 4:51 |
| The Monster Roars | lead vocals | Magnum | 4:01 |
| The Moonflower Society | lead vocals | Avantasia feat. Bob Catley | 5:14 |
| The Piper at the Gates of Dawn | | Avantasia feat. Ronnie Atkins, Jørn Lande, Eric Martin, Bob Catley & Geoff Tate | 7:20 |
| The Piper at the Gates of Dawn | guest and lead vocals | Avantasia feat. Ronnie Atkins, Jørn Lande, Eric Martin, Bob Catley & Geoff Tate | 7:20 |
| The Present Not the Past | lead vocals | Magnum | 5:26 |
| The Prize | lead vocals | Magnum | 3:41 |
| The Serpent Rings | lead vocals | Magnum | 6:47 |
| The Sixth Extinction | | Ayreon | 12:19 |
| The Spirit | lead vocals | Magnum | 4:18 |
| The Story Ain't Over | lead vocals | Avantasia | 4:45 |
| The Story Ain’t Over | guest and lead vocals | Avantasia | 5:29 |
| The Story Ain’t Over | additional and lead vocals | Avantasia | 4:59 |
| The Teacher | lead vocals | Magnum | 3:22 |
| The Word | lead vocals | Magnum | 4:55 |
| Unnatural Selection | | Ayreon | 7:16 |
| Vicious Companions | lead vocals | Magnum | 3:44 |
| Walk the Silent Hours | lead vocals | Magnum | 4:54 |
| Walking the Straight Line | lead vocals | Magnum | 4:52 |
| We All Play the Game | lead vocals | Magnum | 4:07 |
| We Rule the Night | additional and background vocals | Ten | 5:29 |
| Where Are You Eden? | lead vocals | Magnum | 5:36 |
| You Can’t Run Faster Than Bullets | lead vocals | Magnum | 5:33 |
| Young and Precious Souls | lead vocals | Magnum | 4:04 |
| Your Blood Is Violence | lead vocals | Magnum | 6:45 |