User blog comment:SlyCooperFan1/Ace Combat Infinity Update 13/@comment-26402553-20160121021012

Things done according to the update notification:

Added Moscow Battle (hard), excalibur raid IV, new limited time only rule for TDM (Ring Battle) (no idea what this is), new challenges, Area R1V / Cloudy and Moscow / snowstorm added to free flight, function to exchange research reports, a page function for the skin list so that you can view skins in possession over multiple pages, changed some details of the member list that is displayed during missions and pause screen, changed details of display under the aircraft restricted tab on the search result screen, the ADA01B Adler got added (finally), the EA-6B Prowler got added. That's all I've noticed so far.