Gradius Collection, known in Japan as Gradius Portable, is compilation of five Gradius games, converted for play on the Sony PSP. The games were reprogrammed to take advantage of the PSP's wider display, as well as allowing players to play each game in their original aspect. Four of the games were taken directly from the arcade game, while Gradius Gaiden was a Japanese only release for the PlayStation. It is a compilation of the following games:

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