There are at least two bands with this name:
1) Dreamscape is a German progressive metal band, founded by lead guitarist Wolfgang Kerinnis and rhythm guitarist Stefan Gassner in 1986. After countless changes in the line-up, singer Tobi Zoltan, drummer Andreas Angerer and bassist Benno Schmidtler stayed with them.
After very thorough preparations, they started performing live in 1992. After more line-up changes, they produced three demos in between 1993 and 1995 called Dreamscape, Decisions, and Changes. Read more on Last.fm