Az Ayreon vendégzenészeinek listája

Az itt felsorolt zenészek részt vettek valamelyik Ayreon album elkészítésén. Rajtuk kívül az együttes alapítója, Arjen Lucassen énekelt minden albumon és sokféle hangszeren játszott is.

Ének

Énekes	Album, amin szerepelt	Szerepe
Andi Deris (Helloween)	Universal Migrator Part 2: Flight of the Migrator
Anneke van Giersbergen (The Gathering)	Into the Electric Castle	Egyiptomi
	Ayreonauts Only	-
Astrid van der Veen (theEndorphins)	Ayreonauts Only	-
	Fate of a Dreamer (Ambeon)	–
Axel Joseph Langemeijer (ex-Bodine)	III · Three Times Running (Bodine)	–
Barry Hay (Golden Earring)	The Final Experiment	–
Bruce Dickinson (Iron Maiden)	Universal Migrator Part 2: Flight of the Migrator	–
Damian Wilson (ex-Rick Wakeman, Threshold (UK), Landmarq)	Into the Electric Castle	Lovag
	Universal Migrator Part 1: The Dream Sequencer	–
	Ayreonauts Only	-
Dan Swanö (Nightingale, Edge of Sanity, ex-Bloodbath (Swe))	Space Metal (Star One)	–
Dave Brock (Hawkwind)	Space Metal (Star One)	–
Debby Schreuder	The Final Experiment	–
Devin Townsend (Strapping Young Lad, The Devin Townsend Band)	The Human Equation	Düh
Devon Graves (Dead Soul Tribe, Psychotic Waltz)	The Human Equation	Gyötrelem
Edward Reekers (ex-Kayak)	Into the Electric Castle	Jövőbeli
	Universal Migrator Part 1: The Dream Sequencer	–
	The Final Experiment	-
	Actual Fantasy	-
	Ayreonauts Only	-
Edwin Balogh (ex-Omega)	Into the Electric Castle	Római
Eric Clayton (Saviour Machine)	The Human Equation	Ok
Erik Norlander	Universal Migrator Part 1: The Dream Sequencer	–
	Universal Migrator Part 2: Flight of the Migrator	–
Fabio Lione (Rhapsody of Fire)	Universal Migrator Part 2: Flight of the Migrator	–
Fish (Fish, ex-Marillion)	Into the Electric Castle	Hegylakó
Floor Jansen (ReVamp, After Forever, Northward, Nigthwish)	Universal Migrator Part 1: The Dream Sequencer	–
Gary Hughes (Ten)	Ayreonauts Only	–
George Oosthoek (Orphanage)	Into the Electric Castle	Halál
Hansi Kürsch (Blind Guardian)	01011001, The Source, Universe	–
Heather Findlay (Mostly Autumn)	The Human Equation	Szerelem
Ian Parry (Elegy)	Universal Migrator Part 2: Flight of the Migrator	–
	The Final Experiment	-
	Ayreonauts Only	-
Irene Jansen (ex-Karma)	The Human Equation	Szenvedély
Jacqueline Govaert (Krezip)	Universal Migrator Part 1: The Dream Sequencer	–
James LaBrie (Dream Theater)	The Human Equation	Én
Jan-Chris de Koeijer (Gorefest)	The Final Experiment	–
Jay van Feggelen (ex-Bodine)	Into the Electric Castle	Barbár
	The Final Experiment	-
Johan Edlund (Tiamat, Lucyfire)	Universal Migrator Part 1: The Dream Sequencer	–
Lana Lane	Universal Migrator Part 1: The Dream Sequencer	–
	Universal Migrator Part 2: Flight of the Migrator	–
Lenny Wolf (Kingdom Come)	The Final Experiment	–
Leon Goewie (Vengeance (Neth))	The Final Experiment	–
	Ayreonauts Only	-
Lucie Hillen	The Final Experiment	–
Magnus Ekwall (The Quill)	The Human Equation	Büszkeség
Marcela Bovio (ex-Hydra, Elfonía, Stream of Passion)	The Human Equation	Feleség
Mark McCrite (Rocket Scientists)	Universal Migrator Part 1: The Dream Sequencer	-
Mikael Akerfeldt (Opeth, ex-Bloodbath (Swe))	The Human Equation	Félelem
Mike Baker (Shadow Gallery)	The Human Equation	Apa
Mirjam van Doorn	The Final Experiment	–
Mouse (Tuesday Child)	Universal Migrator Part 1: The Dream Sequencer	–
	Ayreonauts Only	-
Neal Morse (ex-Spock's Beard)	Universal Migrator Part 1: The Dream Sequencer	Az első ember
Okkie Huysdens	Actual Fantasy	–
Peter Daltrey (ex-Kaleidoscope)	Into the Electric Castle	Forever of the Stars
Ralf Scheepers (Primal Fear)	Universal Migrator Part 2: Flight of the Migrator	–
Robert Soeterboek (Wicked Sensation)	Universal Migrator Part 2: Flight of the Migrator	–
	The Final Experiment	-
	Actual Fantasy	-
	Ayreonauts Only	-
Robert Westerholt (Within Temptation)	Into the Electric Castle	Halál
Russell Allen (Symphony X)	Universal Migrator Part 2: Flight of the Migrator	–
Ruud Houweling (Cloudmachine)	The Final Experiment	–
Sharon den Adel (Within Temptation)	Into the Electric Castle	Indián
Simone Simons (Epica)	01011001	–
Timo Kotipelto (Stratovarius)	Universal Migrator Part 2: Flight of the Migrator	–

Gitár

• Gary Wehrkamp (Shadow Gallery) – Universal Migrator Part 2: Flight of the Migrator
• Jan Somers (Vengeance (Neth))
• Michael Romeo (Symphony X) – Universal Migrator Part 2: Flight of the Migrator
• Oscar Holleman (ex-Vengeance (Neth)) – Universal Migrator Part 2: Flight of the Migrator
• Peer Verschuren (ex-Vengeance (Neth))
• Rheno Xeros (ex-Bodine)
• Ruud Houweling (Cloudmachine)

Basszusgitár

• Armand van der Hoff (ex-Bodine)
• Jan Bijlsma (ex-Vengeance (Neth)) – The Final Experiment
• Jolanda Verduijn – The Final Experiment
• Peter Vink (ex-Finch) – The Final Experiment és Actual Fantasy (újra-kiadáson)
• Rheno Xeros (ex-Bodine)
• Walter Latupeirissa (Snowy White)

Fuvola

• Barry Hay (Golden Earring)
• Ewa Albering (ex-Quidam)
• Jeroen Goossens (ex-Pater Moeskroen) – The Human Equation
• John McManus (Celtus) – The Human Equation
• Thijs van Leer (Focus) – Into the Electric Castle

Didgeridoo

• Jeroen Goossens – The Human Equation

Billentyű / Zongora / Hammond orgona

• Cleem Determeijer (ex-Finch) – The Final Experiment, Ayreonauts Only és Actual Fantasy
• Clive Nolan (Arena) – Into the Electric Castle, Universal Migrator Part 1: The Dream Sequencer és Universal Migrator Part 2: Flight of the Migrator
• Erik Norlander – Universal Migrator Part 2: Flight of the Migrator
• Gary Wehrkamp (Shadow Gallery) – Universal Migrator Part 2: Flight of the Migrator
• Jens Johansson (Stratovarius)
• Joost van den Broek (After Forever) – The Human Equation
• Keiko Kumagai (Ars Nova) – Universal Migrator Part 2: Flight of the Migrator
• Ken Hensley (ex-Uriah Heep) – The Human Equation
• Martin Orford (IQ, Jadis) – The Human Equation
• Oliver Wakeman – The Human Equation
• René Merkelbach – The Final Experiment, Into the Electric Castle, Ayreonauts Only, Actual Fantasy és Universal Migrator Part 2: Flight of the Migrator
• Robby Valentine (Valentine) – Into the Electric Castle
• Roland Bakker (ex-Vengeance (Neth)) – Into the Electric Castle
• Ton Scherpenzeel (Kayak) – Into the Electric Castle

Szitár

• Jack Pisters – Into the Electric Castle

Cselló

• Dewi Kerstens
• Marieke van der Heyden – The Human Equation
• Taco Kooistra – Into the Electric Castle

Dob

• Ed Warby (Gorefest) – Into the Electric Castle, Actual Fantasy(újra-kiadáson), Universal Migrator Part 2: Flight of the Migrator és The Human Equation
• Ernst van Ee (Trenody) – The Final Experiment és Ayreonauts Only
• Gerard Haitsma (ex-Bodine)
• John Snels (ex-Vengeance (Neth))
• Matt Oligschlager (ex-Vengeance (Neth))
• Rob Snijders (ex-Celestial Season) – Universal Migrator Part 1: The Dream Sequencer
• Stephen van Haestregt – Ayreonauts Only
• Alexander Manyakin (ex-Aria)

Hegedű

• Ernö Olah (Metropole Orchestra) – Into the Electric Castle
• Pat McManus (Celtus)
• Robert Baba – The Human Equation