Decrypt - Sii

Don't try to decrypt every file at once. Only unpack what you need (e.g., def.scs for economy changes) to keep your workspace clean.

A screenshot of a Notepad++ window showing a truck definition file next to a Euro Truck Simulator logo. sii decrypt

If you’ve ever wanted to manually edit your profile in Euro Truck Simulator 2 (ETS2) or American Truck Simulator (ATS) to add money, change truck parts, or fix a bugged save, you’ve likely encountered .sii files. By default, modern versions of these games store save data in a compressed or binary format that looks like gibberish when opened in a text editor. Don't try to decrypt every file at once