With the rise of alternative rock in the mid-1990s, the band's albums subsequently featured an increasing reliance on acoustic guitars and mellower tunes, including a fully acoustic album. Petra returned to its roots with a hard rock album in 2003, while the 2010 Classic Petra reunion was billed as an effort to re-record some of the band's early 1980s hits "with a modern edge". It included two new songs that fit within the guitar- and keyboard-based rock style that marked much of the band's early career.