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Unofficial PS5 'FPS Boost' mods are radically improving PS4 back compat
Whether it's via FPS Boost or bespoke software upgrades, backwards compatibility on the current-gen consoles delivered …
We don't have the complete picture here, but our impression is that officially updating PS4 games to run in bespoke performance modes on PS5 required the code to be ported to a later Sony SDK in order to deliver an appropriate patch. Shadow of the Tomb Raider received 'back compat plus' upgrades for Xbox Series and PlayStation 5 consoles - but only because the FPS Boost release from Microsoft unearthed a game-breaking bug. In our initial back compat testing, we found that the unlocked disc version of Assassin's Creed Unity couldn't sustain 60fps on PS5 where it could on both Xbox Series consoles (and it received FPS Boost support in due course).
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