"From Parodius is a series of comical shooting games from Konami (currently Konami Digital Entertainment). The first game was "Parodius – The Octopus Saves the Earth" for the MSX in 1988, and in 1990 the arcade game "It's Parodius!" sequelled the first game.
The name is taken as a Parody of the shooting game series Gradius. Vic Viper, the ship from Gradius, is always a selectable character in the Parodius games.
The serie consists of:
1988: Parodius – The Octopus Saves the Earth (MSX original)
1990: It's Parodius! From Legend to Laughter (arcade original, ported to several systems)
1994: Deluxe Parodius – In Search for the Former Fame (arcade original, ported to several systems)
1995: Live Talking Parodius (SFC original)
1996: Sexy Parodius (arcade, PSX, Saturn)
2007: Parodius Portable (PSP, compilation of all 5 games.
there were also the spinoff Parowars" (PSX, a war simulation game) in 1997 and the radio drama Deluxe Parodius the same year."
Source: Wikipedia, "パロディウス", available under the CC-BY-SA License.