> For the complete documentation index, see [llms.txt](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq.md).

# FAQ

- [How to install MetaMask extension for your browser?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-install-metamask-extension-for-your-browser.md)
- [How to register MetaMask Account?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-register-metamask-account.md)
- [How to add Polygon network to MetaMask?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-add-polygon-network-to-metamask.md)
- [How to add USDT to Metamask on the Polygon (MATIC) Network?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-add-usdt-to-metamask-on-the-polygon-matic-network.md)
- [How to add HTC to Metamask on the Polygon (MATIC) Network?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-add-htc-to-metamask-on-the-polygon-matic-network.md)
- [How Can I buy USDT?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-can-i-buy-usdt.md)
- [How can I buy Heart Games NFT on Marketplace(BETA)?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-can-i-buy-heart-games-nft-on-marketplace-beta.md)
- [How to Swap HTC for USDT?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-swap-htc-for-usdt.md)
- [How can I buy Heart Games NFT on OpenSea?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-can-i-buy-heart-games-nft-on-opensea.md)
- [How to apply the NFT in-game?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-apply-the-nft-in-game.md)
- [How to Mint NFT in Game?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-mint-nft-in-game.md)
- [How to Upgrade NFT in Game?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-upgrade-nft-in-game.md)
- [How to delete your account?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-delete-your-account.md)
- [How to SWAP in-game currency for HTC?](https://docs.heartgames.io/heartcoin-whitepaper-v1.0/faq/how-to-swap-in-game-currency-for-htc.md)