| Platform | Version | Notes | |----------|---------|-------| | | Latest (v1.08+) | Auto-updates; includes all fixes. | | GOG (DRM-free) | Latest | Often provides older version installers optionally. | | Nintendo Switch / PS4 / Xbox | Console-specific | Ports include QoL improvements. | | itch.io | Latest | DRM-free copy from the developer. |
Several Undertale modding communities have preserved the file as a modding base. While these are often clean, you must scan them with antivirus software. Reputable sources include: undertale v1.001 download
The primary purpose of v1.001 was stability. The initial v1.00 had several crashes. However, it also patched out specific glitches that speedrunners used. If you are looking for a v1.001 download to perform specific speedrun strats, you must be careful—many strats were actually patched out in this version, while others were inadvertently introduced. | | itch