When NFT is used in game a lot of depends from the liquidity of the game and how many users the game has.
The price of NFT depends from demand in it and game must have a lot of users that the price of gaming NFT continue to raise.
If the game is popular many people play this game and use gaming NFT.
In such games, the demand for NFT inside the ecosystem is very high.
So first of all it is necessary to promote the game to increase the number of gamers and demand in NFT.