The makers of Fortnite, one of the most popular video games ever, have been quizzed by MPs over what measures are taken to protect players of the game.
Epic Games representatives were asked how it ensured users did not spend too much time or money on the game.
Legal counsel Canon Pence said this was not something the company currently tracked.
This was "extraordinary", said Damian Collins, who chairs the Digital, Culture Media and Sport Committee.
"You're the one who has responsibility," he said.