Instead, they simply wrote:
“Failed to save game data. (CUSA00900)”
Another user, more pragmatic, noted that CUSA00900 only appeared on firmware 9.00—which was also the version that allowed PS4 jailbreaking. A few paranoid hunters speculated that Sony or FromSoftware had hidden a “trapping mechanism” for modders: a soft error that didn’t break the game, but slowly corrupted your emotional attachment to it. Sony eventually patched the 9.00 firmware’s save issues. Most players report that CUSA00900 has become rare—almost extinct. bloodborne cusa00900
The thread received 300 replies. No one offered a fix. No one asked for one.
Fear the old firmware.
“Welcome home, good hunter.” To this day, no official explanation has been issued for why the error clustered around the DLC’s most emotionally punishing bosses. But if you listen closely—past the whir of your PS4’s fan, past the login chime—some say you can still hear the faint sound of a tiny, corrupted save file refusing to let go.
As recently as December 2024, a lone user on a Bloodborne Discord server posted a screenshot: “Just got CUSA00900. First time in two years. Happened right as the Moon Presence did that one-shot attack.” Instead, they simply wrote: “Failed to save game data
In other words, the game remembered you had progressed—but the console chose to forget.