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Take a gander at Iconomi and Game Credits.

Gamecredits is a decent name, but we are probably in a crypto bear market now, so I would be very cautious about new positions.

Coin Marketplace

STEEM 0.18
TRX 0.13
JST 0.028
BTC 64021.36
ETH 3150.26
USDT 1.00
SBD 2.54