David Fairstein: Assisted Cretu on lyrics for E1, E2, and E3.
Frank Peterson: Worked on lyrics on The Voice & The Snake.
Nikolas Marten: Wrote the narrations for the Remember the Future DVD.
Michael Guimbard: Directed the video for Sadeness part I.
Thierry Sadoun: Produced the video for Sadeness part I.
Howard Greenhalgh: Directed the videos for Mea Culpa part II, Principles of Lust, and The Rivers of Belief. Also directed the videos for the MCMXC a.D. Complete Album Video.
Pam James: Produced the video for Mea Culpa part II.
Megan Hollister: Produced the videos for Principles of Lust and The Rivers of Belief.
Julien Temple: Directed the videos for Return to Innocence, The Eyes of Truth, and Beyond the Invisible.
Big TV!: Directed the video for Age of Loneliness.
Angel (not the same as Angel X): Directed the video for Out from the Deep.
Anthea Benson: Directed the video for T.N.T. for the Brain.
Thomas Job: Directed the two videos from E4.
Laura Berkley: She is a British model, and is the main woman in the video for Principles of Lust.
Petri Kokko and Susanna Rahkamo: Two Finnish ice-skaters that were world champions in 1995. They are the ice-skaters featured in the video for Beyond the Invisible, and just happened to win a championship skating to the song after the video was shot.
Milene Zardo: She is a Brazilian model, and is the main woman seen in the video for Push the Limits - seen playing videogames, etc.
Johann Zambryski/Lmp: Credited for design and art direction on all four albums. MCMXC a.D. credits Lmp; The CROSS of Changes doesn't credit him; Le Roi... lists him has Johann Zambryski, Lmp; and Screen credits Lmp for the design and Zambryski for the art direction.
H.P. Uertz: Painted the cover for MCMXC a.D.
Volker Sträter: Created the illustrations for E3.
Steffen Jagenburg: Did some original photography for E4.
Jürgen Thürnau: Enigma's manager.
Anja Schleigl: Enigma's old product manager (she quit a while ago).