Updated system firmware (typically version 12.1.0 or higher depending on the update version). Step-by-Step NSP Update Installation GUIDE: Diablo 2: Resurrected Offline Play : r/SwitchPirates
The 1.0.2 update for Diablo II: Resurrected on Switch primarily addresses critical technical issues that plagued the initial release: diablo ii resurrected switch nsp update 102 install
: Later updates also addressed issues where offline characters could become corrupted when transitioning between different game versions. Installation Requirements To install the Update 1.0.2 NSP file, you will need: Updated system firmware (typically version 12