The core challenge when installing as a backup file (.NSP/.XCI) on a modified Nintendo Switch using Atmosphere custom firmware is bypassing the mandatory Battle.net account authentication required for offline play. While the official game recently received massive expansions like the Reign of the Warlock DLC, underground players face strict digital rights management (DRM) hurdles when installing game updates.
Diablo II: Resurrected Switch NSP Update: How to Get it Working
Use the application to completely offline.
Blizzard confirmed that new content for D2R would be revealed around the franchise’s 30th-anniversary stream. For Switch users, this means: