Roger Harvey, Caroline Dale, Marco Hietala, Tarja Turunen, Tuomas Holopainen, Emppu Vuorinen, Jukka Nevalainen, Andy Findon, Frank Ricotti, Dermot Crehan, Nicholas Bucknall, Anthony Pleeth, Metro Voices, Chris Laurence, John Barclay, Richard Edwards, Derek Watkins, John Heley, Gavyn Wright, Skaila Kanga, Chris Tombling, Pip Eastop, Michael Thompson, Mary Scully, Patrick Kiernan, Boguslaw Kostecki, Peter Lale, Katherine Shave, Julie Andrews, Everton Nelson, GME choir, Perry Montague‐Mason, Jackie Shave, Paul Gardham, Steve Henderson, Mark Berrow, Tim Grant, Warren Zielinski, Bruce White, Chris Baron, Julian Leaper, David Daniels, Gustav Clarkson, Cathy Thompson, Elizabeth Edwards, Rachel Bolt, David Woodcock, Jonathan Williams, Kate Musker, Lynda Houghton, Owen Slade, Leon Bosch, Nigel Black, Dave Stewart, Mark Nightingale, Richard Berry, Rita Manning, Ben Chappell, Nina Robertson, Edward Vanderspar, Simon Fischer, Eddie Roberts, Simon Gunton, David Ayres, Patrick Lannigan, David Vines, Robin Firman, Chris Hooker, Andy Crowley, Zoe Lake, Donald McVay heeft bijgedragen aan Romanticide.