A lot of gaming coins out there each do something a little unique but each are trying to integrate gaming in some way. You can check out the following gaming projects
1) MobileGo
2) GameCredits
3) Storm
6) Digibyte
4) 1st Blood
5) Nexium
7) WAX
#8) Enjin
9) 1337 and more
Enj looks in my opinion best from all these also with usage and profit. Mostly used in popular minecraft but if it will be used in other it will go to moon.