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The only other Visual Novel I've played is Steins;Gate- well, the only other PC visual novel. I've also played the every Ace Attorney game (barring AAI2) and 999: Nine Persons, Nine Doors, Nine Hours (which had one of the most interesting stories I've ever seen in a game), as well as Time Hollow, which was an interesting venture with a main character with generic hair (he wasn't generic, only his hair was).
Steins;Gate as a novel was better than the show (which I watched first), methinks (especially with that incredibly well written "Groundhog Day" ending in the novel), but the show had Hacking to the Gate and dat epic ending theme.
Other than that, I have Clannad and Fate/Stay Night...but the chances of me playing them anytime soon are low. Not because I don't want to, but because...I invested 100 hours in Steins;Gate. I mean, I loved every minute of it, but if I'm to play a visual novel that's 50 hours, I need to be dedicated to the cause. I already knew I liked Steins;Gate from watching the show, but these two...well, I can't see myself going back to Clannad after having watched it, but Fate/Stay Night is untraveled ground, here. The only thing I really know about the series is from Oath Sign...and that's it.
Eh, I might play it one o' these days