The original – and still the best, in my opinion – is available for download on the PSN, and The 3rd Birthday is out for the PSP.
And now, the ESRB has rated Parasite Eve II for the PlayStation 3 and PSP, which typically means it will soon arrive on the Network as a downloadable title.
If you're unfamiliar, this was the highly anticipated sequel to the first title and continued the story of protagonist Aya Brea. Personally, I didn't like the shift from action/RPG to all action; the first gave us an interesting hybrid mechanic that featured a turn-based element, while the sequel was just a real-time horror game like Resident Evil . It was still good, though, and I do recommend it.
By the way, if you aren't old enough, you won't remember all the clamor surrounding the shower scene in PEII. Everyone was talking about how we'd see Aya strip down and while it's tame by today's standards, that scene remains one of the…steamiest in history.