Update: Respawn clarified on Twitter that Titanfall would only require "20gb on Xbox One." The developer also confirmed the 20GB install size. At the bottom of the page, Microsoft states: "Titanfall Bundle: Titanfall game download card inside marked packages; up to 40 GB required." Along with the game code, the Xbox One Titanfall bundle includes a standard Xbox One system, Kinect sensor, Xbox One wireless controller, Xbox One chat headset and one month of Xbox Live Gold. All of this costs the same price as the standalone system, and it releases March 11 in the United States and March 14 in the UK. While the Xbox 360 version install size of Titanfall is still unknown, on PC the game will require roughly 50GB, according to the Origin store. The preparation for Titanfall doesn't stop there for Microsoft, though, as the company just announced Twitch integration for the Xbox One along with the release of the EA-published title. Source: http://www.ign.com/articles/2014/02/25/titanfall-requires-roughly-40gb-install-on-xbox-one