Download Google Sheets For Unity Lite FREE Unity.
Google Sheets For Unity Lite (GSFU), enables the developer to handle game data from Google Drive Spreadsheets. This opens a world of posibilities for collaboratively development & design, simplifying the process of creating, handling, distributing, tweaking and importing data, among localized or distributed teams.
Note that this is the LITE version, for the full edition read more on this Unity forum thread.
GSFU enables the developer to save or fetch values from, and to Google Sheets at runtime or design time. This turns heavy duty tasks like game balancing, tweaking or localization, into an instant and pain-free procedure.
Check the API Reference.