Timebomb is U.D.O.'s fourth album. It was recorded and mixed at Dierks Studios in Cologne from November 1990 to February 1991. This album is the band's most brutal, following a light approach on Faceless World.
The band was aided by Deaffy on lyrics. Deaffy was also the author of the English lyrics on the Accept albums, and is a pseudonym for Gaby Hoffmann (maiden name Hauke), manager of Accept and later married to the guitarist Wolf Hoffmann.