The coin HP has a good POS mining, I like it. But why do you all call XP a game coin? XP has nothing to do with any game, except for a big name. 
if you look at https://www.xpcoin.io/ you can see what XP is about:
XP is a rewards incentive and digital currency combined to a single blockchain designed to reward gamers, students, people positively contributing to society and providing a universal high street currency.