Pre-purchase Aion: Standard Edition or Aion: Collector’s Edition – which contains exclusive Steam content – and play this weekend – 2 days before the official release! (Or even 5 days early for those in Europe.)

Pre-purchase Aion now and login on the 18th at 12:00 PDT to select your character name and choose a server. Play Aion early on the 20th at 12:00 PDT and explore, organize and progress through the game prior to the official launch.
Source Pre-purchase Aion: Standard Edition or Aion: Collector’s Edition – which contains exclusive Steam content – and play this weekend – 2 days before the official release! (Or even 5 days early for those in Europe.)

Pre-purchase Aion now and login on the 18th at 12:00 PDT to select your character name and choose a server. Play Aion early on the 20th at 12:00 PDT and explore, organize and progress through the game prior to the official launch.
Source