Nowadays cryptocurrencies are using for some gaming platform and they use some coin for reward which have their own blockchain. 

Today we see a list of top 15 gaming coins and their blockchain

        Coin Name                          Block chain

• Enjin coin(Enj)                    Ethereum
• Wax (waxp)                        Ethereum
• Decentraland(MANA)       Ethereum
• WINK (WIN)                         Tron
• Funfair (FUN)                    Ethereum
• Loom Network (LOOM)   Ethereum
• TNC Coin (TNC)                Ethereum
• Play Fuel (PLF)                  Ethereum
• Baer Chain (BRC)              Ethereum
• Homeros (HMR)               Ethereum
• CWV Chain (CWV)            Ethereum
• FirstBlood (1st)                 Own Blockchain
• ULTRA (UOS)                   Ethereum
• GAPS (GAP)                     Ethereum
• DMarket (DMT)               Ethereum