In 1999, Tangerine Dream's own record label sold 300 copies of the Millennium Booster album set that included The Keep with a different cover.

Several Tangerine Dream fans relate a story whereby they saw the record in the shops but were not able to purchase it due to a lack of funds.

A track from this LP entitled "The Night in Romania" appeared on YouTube on 16 December 2013, said to commemorate the 30th Anniversary of the release of the film.

Additionally, Kit Rae premiered a photo of what may be the front cover of the 1984 LP on his website The Keep Score by Tangerine Dream: Strange Obsessions for the Music from an Obscure 1983 Supernatural Horror Film in November 2013.

Westdeutscher Rundfunk interviewed Froese in 1989 and played three tracks from The Keep: Tangerine Dream scored the film The Keep in 1983, but the first issue of the soundtrack The Keep (1997) was a limited run of 150 CDs sold at a concert in the UK.

This and the lack of the actual film music has led to an unusual number of unofficial, bootleg and fan releases.