The Pinball Arcade is fan-freaking-tastic if you're up for some good pinball. I also loved the ever-living crap out of Knights of Pen & Paper, which is a simple pick-up-and-play RPG with a lot of quests and a surprisingly addictive combat system that is akin to the original Final Fantasy.
Oh! Scratches is a great horror themed adventure game (it's entirely bloodless, but very creepy), though if he prefers more action/monsters he may get bored of the slow start. Deadlight is violent as Limbo is, it's all shadowed, and as such likely not as bad.
I also forgot about the Penumbra games, which was done by the dudes that did Amnesia before that game, which are very much in that same vein.
As already discussed, I went with the "Don't Be Afraid" option. She needed those words at that very moment. She was about to go back out into the world completely alone, having watched Lee die (I got her to handcuff Lee, which let her go on without shooting Lee. - sidenote: I just put "me" instead of Lee at first. Man, this fucking game...). While having her keep as much of her innocence as possible is definitively a precious thing to try to keep, it just isn't viable in this world, and she seemed to really appreciate how, whenever I had the chance, Lee was straight up with her in the softest way possible.