The company originally licensed the UE3 middleware back in 2005. NCsoft said that the engine will be used to develop two unannounced and "top-tier" MMO titles, but did not specify further what those titles might be.
The company is no stranger to Epic's middleware, having previously utilized the company's Unreal Engine 2 in the development of Lineage 2 (PC) in 2004. The heavily-licensed Unreal Engine 3 is currently at work in projects at 2K Games, THQ, Konami, Square Enix and numerous others.
NCsoft is currently working on a new Lineage (PC) title, and late last year announced the acquisition of the City of Heroes property from series creator Cryptic Studios.