Guilty Gear happened in 1998.
Guilty Gear was created on 1998-05-14.
Guilty Gear Petit happened in 2001.
Guilty Gear Isuka happened in 505.
Guilty Gear XX happened in 2002.
Guilty Gear X happened in 2000.
Guilty Gear X was created in 2000-07.
Guilty Gear XX was created on 2006-12-20.
Guilty Gear Petit was created on 2001-01-25.
Guilty Gear Dust Strikers happened in 2006.
Guilty Gear Isuka was created on 2004-07-29.
Guilty Gear Dust Strikers was created on 2006-04-25.