Dark Souls 1, 2, demon souls, and bloodborne are all awesome games that From Software did an amazing job with. The dark souls series in particular is their best games yet in my opinion. Everybody knows them for their brutal difficulty, but it's just really satisfying once you best the boss you've been stuck in for days. The good part about these games is that none of them have been bad or have gotten bad reviews. People will just say which one they prefer more. If you've never played any of them, I'd start with Demon Souls if you have a PS3. But again, you can start with any of them and have tons of fun.