Ooof! Quite a list! Transformation is the main one, as the main thrust of the game is finding people and changing them according to their desires. It's wider than it's deep, but to give you an example we've got:
Cow girl, bull boy, digitized hentai character, punk rocker, sissy, vampire, werewolf, gender swap, twincest, naga, dominance, submission, demons (of course), genie, kitsune
And a whole lot of short scenes that do all sorts of stuff, though not as deeply as those above. It's a heavy reading game, more text than art, but if any of that piques your interest, I hope you enjoy!