Dutch multi-instrumentalist Arjen Anthony Lucassen has been involved in a number of different projects in his two-decade plus career. Most notable among these have been heavy metal band Vengeance in the 1980s, and in the '90s, the progressively experimental Ayreon, whose every album featured guest vocalists like Kingdom Come's Lenny Wolfe, Marillion's Fish, and the Gathering's Anneke van Giersbergen -- usually enacting different characters in virtual art rock operas. Somewhere in between lies Star One, whose grandiose ambitions were pretty much described by 2002's Space Metal, and its live companion piece a year later, Live on Earth. Both also came with a revolving cast of guest performers. Another project, Stream of Passion, featured Lucassen with Mexican singer Marcela Bovio; that band released several albums during the 2000s and 2010s.