I don't know a ton about this, but it seems there are a bunch of different game related cryptos now, DOGE (sort of), GAME, Skincoin (https://cointelegraph.com/press-releases/gaming-cryptocurrency-for-esports-industry-skincoin-announces-crowdsale-on-june-21-2017), and I remember hearing about a couple others. For me it's hard to say which one is the "best" although perhaps there's room for several as long as they each have a unique angle.