Seasons of the Sakura was one of the ones I've played. I saw all the endings in that one.

As for Clannad, that was originally a PC game before it got remade into a manga/anime. It's a romance-themed visual novel. Which is basically what most h-games are (not all h-games are visual novels though). Except h-games have X-rated content. I would imagine that the game is actually better than the manga/anime but I haven't sampled any Clannad at all yet so can't say. I remember watching the Tsukihime (another "high-brow" h-game romance visual novel) anime after playing the game and while it was enjoyable, the game was so much better (however the game did have a lot of filler. It probably took me 50 hours to get all the endings. And that 50 hours is pure reading.)

*shutters* and is that eye shadow? 

KOTOR2.  I have a thing for withered old Sith Lords.

Juri is supposed to be lesbian. There's a good bit of stuff out there involving her with Chun-Li or Cammy (or both simultaneously), but that's actually closer to Capcom's intent for her than most doujinshi

Super Smash Bros. Melee and Brawl.

Because they're sooo good.

Imagine Bab......wait.  Is this a trap?  It's a trap.  Nice try, VGChartz.  Nice try.

lol, rule 34.

None because their video games and arent real.

You can say that again:

for me it was Dante's inferno (some cut scenes were so real!),Heavy rain,God Of War III