It's mostly hype from the marketing team pushed onto developers. 90% of use cases of block chain are just over eager MBAs pushing developers to add blockchain so they can be excited about it.

For this, it's probably NFTs, which are guaranteed to be unique, but... the cool thing about blockchain is that the guarantee is true even in a decentralized service. A video game company is centralized, they can make whatever they want unique already. So it's 99% likely to just be a buzzword.

There are some really good uses of blockchain. A decentralized steam-like platform would be amazing. A decentralized venmo/paypal. The ownership of a game would be great to have on a blockchain so even if a company goes out of business you can still say you own this game. Any game mechanics themselves are stupid.