E-Ohkoku no Yakyuken
Publisher: Ero Ero Ohkoku
Caveats: Lolicon, Hard Gay, some gore (the 2ch cat)
A highly extensive yakyuken game made in Flash. Containing over 100 characters at the latest edition spanning many anime, games, Japanese celebrities, and even internet memes, this game will probably keep the strip game fan busy for hours. To play, you must first select your character from the menu and click their SD picture, then select who you wish to play against and repeat. Every character has a unique introduction for their first strip scene and indeed, some characters are wearing more clothes than others, making them easier to strip or for a more challenging experience, playing as them against a more clothed opponent. Animation is mostly image sliding and eyeblinks, and clothes disappear in flashes of white, but the artwork of the characters is well done. My only wish is that you could request new characters, as it seems to be up to the whim of the creator.
You can play this game via this link. The DLsite edition, available from the banner link below, covers the first 200 characters to be placed in the game.
* - A download version was made available by a hentai newsgroup; it isn't the current version but the censorship was removed. They apparently planned on updating this version whenever the official version on the site was updated, but apparently interest was lost as no new versions have come out since. Nonetheless, these screenshots are taken from that version; the official version is usually updated twice a month with new characters.