I'm playing Parasite Eve II (PS One Classic) on my Vita right now! Sure I don't have to stress my handheld's hardware to run the game, but I'm still goosing my silicon all the same. I'm also playing it with my Hori Remote Play Assist Attachment equipped on my Vita Slim. ;) The game is amazing. It's a Resident Evil clone with RPG elements added. Highly recommended!