RPCS3 is pretty great as far as emulating PS3 is concerned. You can check compatibility of specific games here but overall most of the library is playable to completion.
I can only vouch for Dark Souls, Drakengard 3 and Nier at the moment but all of those worked really well even on Steam Deck.
I can’t say much about Xbox emulation but the two emulators I’m aware of are: xemu (has native build), and Cxbx-Reloaded (requires Wine). Don’t know how well either of those works from experience, however xemu does have a compatibility page which looks promising.
RPCS3 is pretty great as far as emulating PS3 is concerned. You can check compatibility of specific games here but overall most of the library is playable to completion.
I can only vouch for Dark Souls, Drakengard 3 and Nier at the moment but all of those worked really well even on Steam Deck.
I can’t say much about Xbox emulation but the two emulators I’m aware of are: xemu (has native build), and Cxbx-Reloaded (requires Wine). Don’t know how well either of those works from experience, however xemu does have a compatibility page which looks promising.