It started with the introduction of bravery bonus in September 2011; see http://ddowiki.com/page/Bravery_Bonus. MOTU was released in 2012. By then elite was the default difficulty.
It started with the introduction of bravery bonus in September 2011; see http://ddowiki.com/page/Bravery_Bonus. MOTU was released in 2012. By then elite was the default difficulty.