Gradius - video game - happened in 8801.
Gradius - video game - was created on 1985-05-29.
Gradius II happened in 1988.
Gradius Gaiden happened in 1997.
Gradius Galaxies happened in 2001.
Gradius V happened in 2004.
Gradius III happened in 1989.
Gradius ReBirth happened in 2008.
Well, gradius is one. That big ship thingy and the music as well. Donkey Kong vs. King Krool, MegaMan vs. Dr. Wily..you know. These are only the original Classics.
Game Over - video game - happened in 1987.
Gradius II was created on 1988-03-24.
Gradius Gaiden was created on 1997-08-28.
Gradius Galaxies was created on 2001-11-09.