en (naast hun oorpsronkelijke development studio in korea)
* ArenaNet (Bellevue, Washington) – ArenaNet is the creator of one of the most successful MMORPG franchises in the world, Guild Wars.
* Carbine Studios (Aliso Viejo, California) – Carbine Studios was founded in 2005 and is working on an unannounced title.
* Game Production Studio (Seattle, Washington) – The NCsoft Game Production Studio brings products from the NCsoft development teams in Seoul to the West, including Lineage, Lineage II, Exteel and Aion.
* Paragon Studios (Mountain View, California) – Formerly called NCsoft NorCal, Paragon Studios develop the popular City of Heroes franchise.