Outside of the official Unity plugin, there are community-made tools like the , a Python package on PyPI that allows for external editing of ES3-generated files, which is frequently used for modding games like Phasmophobia . Easy Save - The Complete Save Game & Data Serializer Asset
Easy Save 3 (ES3) files—common in Unity games like Lethal Company Tape to Tape save editor es3
You cannot always just "add" an item via the editor GUI. Instead: Outside of the official Unity plugin, there are
Many older tools (2015–2018) fail on ES3 files from game versions with updated plugin format (e.g. Skyrim Anniversary Edition adds new record types). Outside of the official Unity plugin