The consumer protection agency is not yet commenting on whether it will pursue legal action.
Fortnite, Red Dead Redemption 2, and Super Smash Bros. Ultimate led the way.
The United States video game industry grew 18 percent last year.
A year of successful disruption has positioned Epic to turn the screws on Valve on behalf of developers.
DFC Intelligence analysis suggests the market will continue to grow with Asia being the biggest gain as a result
There's a striking parallel between sidequesting and picking up gigs to earn some extra cash