UPDATE: Geoff Keighley has also stated that there will be a live stream tomorrow (May 13th) that will include a showcase and interview. That will occur at 8am PST / 11am EST / 5pm CEST.
Original Article: In a surprise announcement, the Summer Game Fest account will be revealing an unannounced game later today at 9am PST / 12pm EST / 6pm CEST.
Our Take
Given the nature of the announcement, we’re not expecting a AAA title here but we’re still excited to see what they have in store!
