Groups comparison
Gradius (グラディウス) - 1985 to 2012
Konami shooter series including all Gradius, Nemesis and Salamander games.
Parodius(パロディウス) - 1988 to 2007
Sub-series of Gradius, shooter games by Konami. "Parodius" is a portmanteau of "parody" and "Gradius", but it also parodies other Konami franchises.
Otomedius (オトメディウス) - 2007 to 2011
Sub-series of Gradius, shooter games by Konami. "Otomedius" is a portmanteau of "otome" (乙女, "maiden") and "Gradius."
Konami shooter series including all Gradius, Nemesis and Salamander games.
Parodius(パロディウス) - 1988 to 2007
Sub-series of Gradius, shooter games by Konami. "Parodius" is a portmanteau of "parody" and "Gradius", but it also parodies other Konami franchises.
Otomedius (オトメディウス) - 2007 to 2011
Sub-series of Gradius, shooter games by Konami. "Otomedius" is a portmanteau of "otome" (乙女, "maiden") and "Gradius."
gradius
parodius
otomedius