Castlevania II: Belmont's Revenge (AKA: ドラキュラ伝説 II, Dracula Densetsu II, The Legend of Dracula II) is the second Castlevania work released for Game Boy by Japan's KONAMI in 1991 (as a sequel of the first work Castlevania: The Adventure).

Castlevania II: Simon's Quest (AKA: ドラキュラⅡ 呪いの封印 , Dracula II: Seal of the Curse, Akumajo Dracula II: The Accursed Seal) was the continuation work for floppy disk edition of Castlevania, released for the Family Computer Disk System in Japan in 1987 and for the Nintendo Entertainment System in North America in 1988. And this work did not sale the Japanese cartridge edition.

Super Castlevania IV (AKA: 悪魔城ドラキュラ, Akumajō Dracula, Devil's Castle Dracula) is the only one work allows to whip in eight directions in Nintendo Castlevania series. In addition to 11 levels of straight line plot, it also provides 3 secret states for players to explore.

There are a lot of good and free games, but after having been played, most of which may be generally deleted from our hard drive without hesitation, especially those that are easily up to several GBs or even more so-called masterpieces. But for some games, you probably  want to treasure them forever, because you know that those are rare gems in your lifetime. Cave Story is such a game, of course, perhaps also because it is less than 1 MB (600+ KB) in size.