A metaverse is a 3D virtual universe that lets you do many things, including play games through avatars, which are your digital replicas enabled to access the virtual universe and interact with its elements on your behalf. So, you can access and play games in a metaverse through avatars, which are essentially NFTs or non fungible tokens. Each NFT represents a digital asset, an avatar in this case. Most metaverses have their own NFTs. So, when looking to access a metaverse to play games or anything else, you need to buy their NFTs, which enable you to use your avatar to play games in the virtual world.