It wouldn't really be fair to Alika if I gave more info now. The trick is what I already said, start by seeing what Holly could be referring to and from there see if you can find an association with RPGs.
2008/ Laxius Force 2009/ 3 Stars of Destiny - Laxius Force II - Millennium - Asguaard - Millennium 2 2010/ Dreamscape - Ella's Hope - Laxius Force III - Millennium 3 2011/ Sylia - Millennium 4 2012/ The Book of Legends - Moonchild - Opaline 2013/ ???