You could edit an ES3 file with a traditional hex editor, but the experience is painful. Easy Save 3 uses variable-length fields and type markers. Changing a single digit might break the entire file structure if you don’t also update length prefixes.
Save Editor ES3 understands the serialization format natively. It recalculates checks, preserves type integrity, and warns you if a modification would break the load order. save editor es3
This is a standalone application specifically designed to parse Unity’s Easy Save 3 files. These tools read the file header, decode the serialized types (ints, floats, strings, vectors, lists), and present them in a human-readable GUI. This is the gold standard for beginners. You could edit an ES3 file with a
The ES3 Editor is integrated directly into the Unity Editor interface. It can be accessed via the top menu bar: Upon opening the window, the editor scans the
Upon opening the window, the editor scans the project for valid ES3 file extensions (default .es3, also supports .json, .txt, .dat, .sav).
Search for keys like achievement_flags, unlocked_0, or stats_progress. Change false to true or 0 to 1. Reload the game, and the achievements should pop.