 Key released on all ages version on July 27, 2001, for Windows.An updated adult version called the "Air Standard Edition" was released on April 8, 2005, with added support for Windows 2000/XP as a DVD-ROM.An updated all ages version of "Air" compatible for Windows Vista PCs was released by Key on July 31, 2009, in a box set containing five other Key visual novels called Key 10th Memorial Box.