Riot Games just announced moving to a brand new campus in Spring 2015, with the current space at Santa Monica getting too tight for comfort. Located within ElementLA, the new office will house around 1,000 employees, with room for further expansion.
The 284,000 square feet location will also sit beside an upcoming metro (or train) station, with the rental lease signed for 15 years. Voted best developer to work for recently, Riot Games certainly has come a long way with just 1 mega product in League of Legends.