Original AC3 on PC uses a primitive save encryption tied to your Ubisoft account. If the game says “Save data corrupted” after replacement:

In the modern era of gaming, we rely heavily on cloud saves. However, sometimes Steam or Ubisoft Connect fails to upload the correct file, or worse, downloads an older version of your progress, overwriting your current playthrough. If you lost progress right at the end of Sequence 2 or the start of Sequence 3, downloading a completed Sequence 3 file is the fastest way to "teleport" back to a playable state.

Before diving into the "how," it is important to understand the "why." Sequence 3 is a critical juncture in the game. It serves as the prologue for Ratonhnhaké:ton (Connor) and sets the stage for his transformation into an Assassin. Here are the most common reasons players search for a save file at this specific point:

Remember: always match the save file to your game version (Original vs. Remastered), use the decryption tool if needed, and never forget to back up your progress.

C:\Users\ \Documents\Assassin's Creed III Remaster\Saves How to Install a Downloaded Save Backup Your Saves