Lucassen plays a wide variety of instruments: his main instruments are guitar and keyboards, however he also plays bass, banjo and many others. Overall, in his career and including all his bands and projects (as principal instrumentalist/creative force or as a member), Lucassen has released twenty-six studio albums, four live albums, two EPs and seventeen singles. He has also made many minor participations alongside various artists including Shadow Gallery, After Forever, Within Temptation and Avantasia, and appears in over 50 albums.