Video game ratings in the UK and rest of Europe will warn if a game has loot boxes and other random paid-for items.
Regulator Pegi has assigned a generic in-game purchases label to video games since September 2018.
It says publishers will now be required to provide additional information regarding the nature of these purchases.
A similar system is being introduced in the US but it is unclear how effective either will be.
Global video game franchises including Fifa and Overwatch are among those to offer in-game purchases built around random items.
