Gradius series


 * Gradius
 * Salamander
 * Gradius 2
 * Gradius II
 * Nemesis 3
 * Gradius III
 * Nemesis (GB)
 * Gradius: The Interstellar Assault
 * Salamander 2
 * Gradius Gaiden
 * Gradius IV
 * Gradius Galaxies
 * Gradius V
 * Gradius ReBirth

Spin-offs:
 * Falsion
 * Parodius
 * Parodius Da!
 * Fantastic Parodius
 * Jikkyō Oshaberi Parodius
 * Sexy Parodius
 * Solar Assault
 * Otomedius
 * Otomedius Excellent

Other games in the series:
 * Gradius NEO (Japanese Mobile Phone)
 * Gradius NEO Imperial (Japanese Mobile Phone)