All digital PSP games work, right?
All but one of my PS1 games will work.
If there's a PS1 game not on the PSVita store, put it on your PS3. Don't install it but transfer the bubble over to your Vita. It's a gamble if the game will work though.
and I stick by my words. Chloe doesn't look human in Uncharted 2:
Though that's cherry picking a bit too much: