The Souls games are spiritual successors to From Software’s own King’s Field and Shadow Tower games. Definitely try them if you haven’t already. They’re on PS1/PS2 and are played from a first person perspective but they share the same gothic atmosphere, difficulty level and many gameplay mechanics in common with the Souls series. Shadow Tower Abyss and the original King’s Field 1 were only released in Japan but there are translation patches available if you want to play them. Also be aware this affects the numbering of the KF games in other regions à la Final Fantasy.