Roblox RBLX-N cut its annual bookings forecast on Thursday, fanning concerns about a slump in the videogame industry and sending its shares down 23% to mark their worst day in more than two years.

Roblox shares are down more than 2.6% just after the open on Friday, trading at $43.27 per share. Earlier this month, Roblox topped earnings and bookings consensus expectations for the fourth quarter.