Games that are listed on the compatibility list as working completely fine stick on the loading screen for me.
Games I know do this:
On Sonic Unleashed, the game won't get past the loading screen (which happens as soon as you start it up) with the original sonic running sprite/spin dash sprite - I've waited 15 minutes, and the game just sits there.
On Bayonetta, the logos and everything go by fine, but once it gets to the loading screen before the main menu it just sits.
Also yeah I guess I'll delete Unleashed game data, but I'm pretty sure I've never played Bayonetta before. Also the rip I downloaded had a bunch of positive feedback saying it doesn't lock up on chapter 4.