Great! There's so many classic fairy-tales that are out but I believe the Brother's Grimm versions carry more and have more authenticity if you know what I mean!
It depends; some fairytales like the ones Andersen wrote don't tend to have Grimm versions. I also don't 100% stick to fairytale plots when I adapt them into games, so if you want a game that's closely authentic I fear I might not really deliver what you're hoping for...
Still, if you don't mind some rewritings, you might enjoy any future fairytale adaptations, if I make any.