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The most complete tool for modding, decompiling and unpacking Undertale (and other Game Maker: Studio games!)

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## Description Added a search in code option (Ctrl+Shift+F or in the Search menu) that's meant to replace the Search.csx script. It's faster to open, has that shortcut, and has...

### Describe the bug When opening Undertale Mod Tool I went to go extract Frisk's sprites from the up sprite to the right sprite and Undertale Mod Tool extracts it...

bug

## Description As @colinator27 [noted](https://discord.com/channels/566861759210586112/568950566122946580/1271280990370664469) around the time of GM 2024.8(00) Beta's release, this GM version removes the CodeLocals list from the FUNC chunk. This PR adds logic to detect...

### Which component should be improved? UI/UX ### Describe your feature suggestion in more detail It's possible to configure audio to loop at points other than the start and end...

enhancement

### Describe the bug When I delete everything in every code block from a Shader, nothing happens when I run the game, but when I delete the shader in the...

bug

### Describe the bug ![image](https://github.com/user-attachments/assets/5415c25d-0e59-44c5-8840-04bf93ee8b2f) Seems to be because this data.win contains no LANG chunk. ### Reproducing steps 1. Open Undertale version 1.001 in UTMT 2. Try to use "Find...

bug

## Description Fix #1907 Some games use the official GM-GPUTextureCompression extension to use GPU compressed textures. One of the formats supported is BCN compression, which uses the DDS format, at...

### Describe the bug Attempting to compile this GML code in an object's creation event ``` anon_func = function() { show_debug_message("ANON FUNC"); }; anon_func(); ``` Results in this error ```...

bug

### Describe the bug When using the option "Temp Run Game" on UNDERTALE v1.00, the loading finishes very quickly but the game takes much longer to launch, up to a...

bug

## Description This PR makes it so you can see the ParentEntry property in the code editor. Often when searching for a specific function you'll find the code entry referencing...