I've never played a PSP game until vaguely recently with emulation, for whatever reason no one I knew back when I was a kid ever had one. The Marvel: Ultimate Alliance port is actually pretty good and has some exclusive characters in it (Black Widow, Ronin, the original dude Captain Marvel, and Hawkeye who weirdly was later a DLC character for the X360 version). X-Men Legends 2 also had the same deal with some exclusive characters and is again a great port, and I enjoyed the little bit of the Untold Legends games that I played.