A new report shows that core gamers generated two thirds of all mobile games revenues last year, despite the games themselves only accounting for a fifth of all downloads. That's according to App Annie's State of Mobile 2021 report, which shows that 66% of consumer spend on games across iOS and Android were spent on core games like PUBG Mobile and Honor of Kings. By comparison, casual titles -- with examples given including Roblox, My Talking Tom Friends and Among Us -- only accounted for 23% of all gaming revenues, and casino apps for 11%. App Annie also reports that events were the biggest driver of in-game spending in 2020, accounting for $53 billion -- a big increase over the $1.99 billion spent on in-game events the year before.