is a structured data file typically used by fan-made Yu-Gi-Oh! games, fan projects, or modding tools to store player progress and collection information. While official games like Legacy of the Duelist often use .dat files for saves, many community-developed applications prefer JSON due to its human-readable format and ease of editing. Common Purpose
This file functions as a digital ledger of your in-game status, allowing the application to "remember" where you left off. It typically includes: Tougioh_savedata.json
: Information such as unlocked duelists, completed campaign chapters, and earned currency. is a structured data file typically used by
: Saved configurations of your active and side decks. completed campaign chapters