The Shin Megami Tensei games are..... interesting. They're also some of the hardest RPGs in existence. That doesn't mean they're not fun to play however..... Here are some videos of Digital Devil Saga 1 & 2. The second interesting anthology of the series. )the first for me is Nocturne) I will post more videos of all the games if you want me to. And yes,you can fight the dark lord Satan in this series.
https://www.youtube.com/watch?v=l-sYJEMA-Hw
https://www.youtube.com/watch?v=N1-JWED_HX4