Requirements:
Step 1 - Adding GAME to Metamask on the Polygon Network
Open Metamask. Near the bottom of the application you will see Import Tokens. Click it.
You will see several fields available. Copy the Polygon GAME contract address into the Token Contract Address field. The remaining fields will auto-populate. Click Add Custom Token.
Finally, click Import Tokens to finalize the addition.
Step 2 - Adding GENESIS to Metamask on the Polygon Network
Repeat the same process using the Polygon GENESIS Contract Address. Paste the address into the Token Contract Address field. The remaining fields will auto-populate. Click Add Custom Token.
Confirm the addition by clicking Import Tokens.
Both GENESIS and GAME balances on the Polygon network will now be visible within your Metamask account when the Polygon network is selected.