Sephiroth is one of those characters who just sticks with you, isn't he? I first encountered him in 'Final Fantasy VII', and let me tell you, that game left a mark. While he’s primarily the iconic villain in the original, he does become playable in certain spin-offs and expanded content. For instance, in 'Dissidia Final Fantasy', he’s a fully playable character, and it’s wild to step into his shoes after seeing him as the big bad. The PSP versions and the arcade game 'Dissidia NT' let you wield the Masamune yourself, which feels oddly satisfying given his reputation.
Then there’s 'Final Fantasy VII: Crisis Core', where you get glimpses of his backstory, though he’s not playable there. More recently, 'Final Fantasy VII Remake' teased his presence, but no dice on playing as him—yet. I’ve got a hunch the upcoming parts might change that, given how much Square Enix loves fan service. It’s funny how a character meant to be terrifying becomes so fun to control in alternate settings. Makes you appreciate the complexity of his design even more.