Sin-Decade is the fourth studio album by the Danish hard rock/heavy metal band Pretty Maids.

After the relative commercial failure of the band's previous album, Jump the Gun (1990), the bass guitarist Allan Delong, the keyboard player Alan Owen and the drummer Phil More left the group by late 1990, leaving only the singer Ronnie Atkins and the guitarist Ken Hammer.

[1] The two remaining members began writing songs for a new album, this time with "full creative control" according to Atkins.

According to Atkins, the band decided to work with the Danish producer Flemming Rasmussen to avoid the "over-produced" sound of Jump the Gun.

[2] To complete the band's line-up, Atkins and Hammer recruited drummer Michael Fast and bass guitar player Kenn Jackson.