Star Wars: Knights of the Old Republic
Original Release: 2003, Platforms: Xbox, PC, Mac, iOS
I don't love Knights of the Old Republic because it's a good game. Don't get me wrong, it is. I'd go as far as saying that it's probably one of the best RPGs I've ever played. I love KOTOR most primarily because of the game changer it was for my relationship with my wife. When we first met, she actively disliked Star Wars and, for that matter, most fantasy and science fiction. I, on the other hand, have pretty much been a total geek for that sort of stuff since I was a little kid. We connected with each other on a ton of other levels (hence the marriage, mortgage and child), but that was one area where we were of two different minds.
Then I played Dragon Age: Origins. She spent much of my playthrough watching and, unexpectedly, fell in love with the game, its characters and BioWare. She followed up my game with 15 or so of her own, after which she did the same with Mass Effect and Jade Empire. Sensing an opportunity, I bought her a copy of KOTOR which she agreed to try and wound up really enjoying. She started asking me questions about the Star Wars universe, something that eventually culminated in us watching the movies together. Did she love them like I did? No. But she was able to appreciate them in a way that she hadn't before.
So while I definitely enjoy playing Knights of the Old Republic, it holds a permanent place in my heart because of the way it was able to serve as a bridge between myself and the woman whose company I most adore. We're able to share more of our lives together because of it and the value of that goes well beyond gameplay.