The update will be released on our Aion Live servers on May 25, 2011.
The Aion 2.5 update, Empyrean Calling, will be available to players on the North American and European player test server (PTS) Thursday, May 12, 2011 at 21:00 CEST. The update will be released on our Aion Live servers on May 25, 2011.
If you already have the PTS game client, your launcher can incrementally download the 2.5 client. If you do not already have the PTS client, you can also download the full Aion PTS 2.5 client as an FTP download.