I'm really not sure. Unlike me, my dad, and my sisters, she never really got into technology and therefore, games. Now, not to be sexist here, but I saw her playing Cooking Mama a year back because one of my sisters wanted her to try it. Needless to say, she got the flaming red eyes of death even though I thought that since she can cook well, she'd be good at the game.
I guess I'd try to get her on Portal 2 or a Zelda game. Maybe even KH2 or a FF game from the bargin bin at GamesStop.