Legend of Krystal v0.1.1 This is a very well made game, despite it being very old. Most of the time in animated hentai adaptations, especially those into games (versus just basic flash cartoons), we get a cheap 2D throw together of something made by someone who has game-making skills akin to something more of a Phillips CD-i than a halfway decent flash game. With this game, you actually get an effort-appointed game that offers detailed visuals and mechanics. Though by today's standards, this game doesn't have the typical appeal as other games (especially given its' subject matter), it's a VERY lavish affair for a flash-game; something very avant-garde for hentai games.
While it's impossible to say that many hentai games will have this type of quality, this is something awesome to build upon.
I would definitely give this game 5 stars, but it was unfortunately missing two major aspects in ANY sort of hentai with a female protagonist: 1). Vaginal and 2). Some sort of one-on-one with a character outside the granted plot (i.e. in this case, Fox, maybe?) Still a fantastic game.