The save data has a difficulty level of Impossible, which the developers did not finalize, but left in the game files.

I managed to unlock it through HEX editing of the save. For them to open, you need to use a HEX editor to change the D8 address to a value from 0 to 2 (Easy, Normal, Hard), make the necessary changes in Timeline3, change the D8 address to a value of 3 (this is how you managed to unlock it). I did not find any differences from Hard in terms of damage to the Prince from enemies, from the Prince to enemies, from traps to the Prince. I found only one difference: a bug with the absence of a cheat code after completing the entire game and the inability to save.

For save data to work, you need to patch POP3.exe with the Timeline3 patcher or install dismemberment. The path to install saves is as follows: "Path to game/POP3Profiles/". For example, "D:GamesPrince of Persia - The Two ThronesPOP3Profiles".