Creators of Unreal Engine, one of the two de facto 3rd party game engines in the industry, created way back in the 90's. You very likely played some game or 6 that was made using it. Also the developers of several games themselves like Gears of War, Unreal Tournament, Infinity Blade, and Bulletstorm.
But I guess more recently people would call them "The creators of Fortnite", that free to play battle royale that usurped PUBG as "the face" of the genre. They also have a PC game store that is relatively recent and under some ire from consumers for reasons that'd take a whole essay to fully explain.
As a middleman between games and developers, the reasons to purchase a music vendor is numerous. Time will tell what they do with it, but most of their previous aquisitions are hands-off.
