We've reached out to all major exchanges and wallets to upgrade. Bittrex, BitBay, Cryptopia, HitBTC, Livecoin, and Poloniex all gave confirmation of making the upgrades (or have finished making upgrades and will activate wallets soon)
poloniex.com:
GAME is currently under maintenance or experiencing wallet/network issues.
Deposits and withdrawals will remain disabled until a solution is found, which may require an update from the GAME team.
Any updates must be tested and audited before enabling.