It does not. Whoever implements the NFT integration into whatever game you want to play is in COMPLETE control over your item. If they want to not let you use it, they can do that. If they want to turn it into a floppy penis because they think it's funny, there is zero cryptographic assurance the object wont be modified in any way between the blockchain and the GPU APIs that actually put it on screen.
NFTs "in games" is just laughable. It's a perfect microcosm of how crypto boosters NEVER know anything about what they are talking about, like even the most basic, first sentence of wikipedia things.
There is no system agnostic way to program videogame object behavior. Your NFT can pretend to have whatever functionality it wants, but it's up to the game dev to honor that. If your NFT is a jpeg that you want as a weapon skin, the game dev has to take that blockchain data and pull or parse the jpeg out of it, and there is NOTHING the blockchain can do to enforce that. There's NO cryptography protecting that jpeg after that moment.
And that's just the physical, technical implementation, completely ignoring that it won't get to that step because no game studio will ever care to build anything like that for any reason other than just to sell crypto coins on a marketplace for quick cash.
Or do you somehow actually think EA and Ubisoft and everyone put pay to win mechanics in their games because players are desperate to give them more cash?