Foresight News reports that the foundational gaming ecosystem B3 has announced the deployment of its first game chain testnet in its Open Gaming ecosystem, codenamed 'B4'. B3 indicates that there are 4 more game chain testnets from top game developers set to launch soon. Foresight News reports that the foundational gaming ecosystem B3 has announced the deployment of its first game chain testnet in its Open Gaming ecosystem, codenamed 'B4'. B3 indicates that there are 4 more game chain testnets from top game developers set to launch soon.