In-game spending should be regulated by gambling laws and so-called loot containers restricted wholly for children, MPs say.
The industry’s UK trade body reacted it would “review these recommendations with utmost seriousness”.
But the committee of MPs had accused some of those who had given evidence of a “lack of honest and transparency”.
Free video games often help participates to buy virtual pillage chests, which contain an unknown quantity of items to improve further game-play.
Some sports have associated online marketplaces where musicians can trade or sell these items.