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It was later collected with many more sequels in the PSP exclusive Gradius Collection.

It was rereleased in a compilation package with the sequel Gradius II: Gofer no Yabou in the Gradius Deluxe Pack, a first generation title for the PlayStation and Sega Saturn. Gradius was so popular in Japan, that the Famicom version was released in the arcade using Nintendo's Vs. The game was ported to many systems, most notably the NES and PC-Engine (both versions of which have been made available on the Wii Virtual Console) and the Japanese MSX computer. The second stage has gigantic deadly bubbles that burst into smaller ones when shot, once again a variation of the crystal stage. Designer Kengo Nakamura has said in an interview that the chosen name's similarity to Gladius was coincidental. Arcade The first stage takes place in a desert, and even features sand dragons vaguely similar to the flame dragons from Gradius II. However, the developers went with the name Gradius, and applied the name to the planet that was being attacked by invading aliens.

A Gladius was a short sword used in ancient Rome by legionaries. The title Gradius is thought to have been drived from the Latin term for a sword known as a "Gladius". Konami's arcade game Scramble is often considered a precursor to Gradius. Gradius is considered a highly influential game and has set the foundation for many other horizontal shooters for years to come. Gradius has the distinction of popularizing a weapon selection bar called "Power meter", based upon collecting capsules to 'purchase' additional weapons. The arcade game was originally released in North America and Europe as Nemesis, although some conversions retained the name Gradius in these regions. It was the first game to be released in the Gradius series. Gradius is a horizontally-scrolling shoot 'em up released by Konami in 1985 for video arcades. For Game Boy game released under the international title, see Nemesis (Game Boy).
