The game uses items from the real world. For example, does a product with a certain appearance patent need to be approved? whether there will be infringement.

Generally not, so there is no issue of sales in the patented country.

Because you do not actually produce the same or similar real-life products for profit, but only reflect the form of the product in the real world, such as the AK47 used as a prop in the game, it is impossible and does not need to apply for authorization from the Russian arms company use, so there is no infringement of their rights;

Of course, products with appearance patents should be distinguished. For example, if they are copyrighted products, their basic value can be realized once displayed, and their use in the game Use as logos or scenes may constitute infringement, such as patterns on real objects, especially those that are unique and widely known, such as buildings, artificial landscapes, and character shapes. Game companies can directly use them without permission. If it is used as a game scene or character image, it will be suspected of infringement. Of course, the legal determination of infringement is very strict. If it is similar but not similar, it is difficult to determine whether it is infringement. For specific examples, you can refer to a series of games made by Tencent, which is awesome.