Daniel Gildenlöw [PAIN OF SALVATION]
Tom Englund [EVERGREY]
Hansi Kürsch [BLIND GUARDIAN]
Anneke van Giersbergen [AGUA DE ANNIQUE, ex-THE GATHERING]
Jonas Renkse [KATATONIA]
Bob Catley [MAGNUM]
Jorn Lande [MASTERPLAN]
Floor Jansen [AFTER FOREVER]
Steve Lee [GOTTHARD]
Magali Luyten [VIRUS IV]
Ty Tabor [KING'S X]
Simone Simons [EPICA]
Liselotte Hegt [DIAL]
Phideaux
Marjan Welman
Wudstik
Arjen Lucassen

Doch auch auf der Seite der Instrumentalisten, gaben sich einige alte Hasen der Szene die Türklinke in die Hand:

Arjen Lucassen: Guitar, Keyboards, Synths, Bass Guitar, Programming
Tomas Bodin [THE FLOWER KINGS]: Keyboards
Derek Sherinian [PLANET X]: Keyboards
Joost van den Broek [AFTER FOREVER, STAR ONE]: Keyboards
Michael Romeo [SYMPHONY X]: Guitar
Lori Linstruth [ex-STREAM OF PASSION]: Guitar
Ed Warby [GOREFEST]: Drums
Jeroen Goossens [FLAIRCK]: Flute
Ben Mathot [DIS]: Violin
David Faber: Cello

[Quelle: Ayreon]