For users looking to update on a modded Nintendo Switch using NSP files, the process involves installing a separate update file to enable Chapter 2 and the latest bug fixes. Originally, Chapter 2 was released as a free update to the existing Chapter 1 base. On official firmware, this is handled via the eShop, but for modded systems, you must manually apply the update NSP to your existing base game installation. Essential Files and Preparation
: These chapters were released in June 2025 as part of a paid version for both Nintendo Switch and the newer Nintendo Switch 2 hardware. Key Fixes and Adjustments Recent updates (Version 1.02 and 1.03) included:
A critical aspect of the update's functionality was ensuring that save.dat files created in Chapter 1 were correctly recognized by the Chapter 1 & 2 executable. This required the update to maintain the same unique user ID association and file pathing structure, despite the internal game code changing to support a chapter select screen. deltarune chapter 1 2 switch nsp update work
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To trigger the import prompt again if you accidentally skipped it, you may need to delete the "full version" save data while keeping the demo save data on the console. Version 1.02 Improvements For users looking to update on a modded
To ensure the update works correctly, you need three main components:
Even with the correct files, you may encounter errors. Here is a table of common problems and their solutions: Essential Files and Preparation : These chapters were
Toby Fox’s has captivated fans since its surprise release, offering a deep, character-driven experience that expands on the legacy of Undertale . For players on the Nintendo Switch, managing the game—specifically ensuring that Chapters 1 and 2 are fully updated and functional—is key to a smooth journey through the Dark World.