Sin-Decade is the fourth studio album of the Danish hard rock/heavy metal band Pretty Maids. It was produced by Flemming Rasmussen and Pretty Maids, and it was and released in 1992 by Columbia Records. After the relative commercial failure of previous album, Jump the Gun (1990) bassist Allan Delong, keyboard player Alan Owen, and drummer Phil More left he group by late 1990, leaving only singer Ronnie Atkins and guitarist Ken Hammer left.