Psychedelic trance, psytrance, or psy is a subgenre of trance music characterized by arrangements of rhythms and layered melodies created by high tempo riffs. The genre offers variety in terms of mood, tempo, and style. Some examples include full on, darkpsy, forest, minimal (Zenonesque), hitech psy, progressive, suomi, psy-chill, psycore, psybient, psybreaks, or "adapted" tracks from other music genres. Goa trance preceded psytrance; when digital media became more commonly used psytrance evolved. Goa continues to develop alongside the other genres.

Trance is a genre of electronic dance music that emerged from EBM in Frankfurt, Germany, in the late 1980s and early 1990s, and quickly spread throughout Europe.