The most complete tool for modding, decompiling and unpacking Undertale (and other Game Maker: Studio games!)
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RisohEditorKatayama Hirofumi MZ
katahiromz.RisohEditorv5.9.5
Another free Win32 resource editor
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JPEXS Free Flash DecompilerJPEXS
JPEXS.FFDecv26.2.1
JPEXS Free Flash Decompiler (FFDec) is opensource flash SWF decompiler and editor. Extract resources, convert SWF to FLA, edit ActionScript, replace images, sounds, texts, fonts and more. Various output formats available.
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ILSpyICSharpCode Team
icsharpcode.ILSpy.Previewv10.0.0.8323-preview3
Cross-Platform .NET assembly browser and decompiler.
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ILSpyICSharpCode Team
icsharpcode.ILSpyv10.1.0.8386
Cross-Platform .NET assembly browser and decompiler.
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IDA FreewareHex-Rays SA
Hex-Rays.IDA.Freev8.4
The free binary code analysis tool to kickstart your reverse engineering experience.
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dnSpydnSpyEx
dnSpyEx.dnSpyv6.5.1
dnSpyEx is a unofficial continuation of the dnSpy project which is a debugger and .NET assembly editor.
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D
dEXEturtle170
dEXE.dEXEv0.1.1
An agentic x86_64 ELF/PE binary decompiler to functional C99
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A
AssetRipperAssetRipper
AssetRipper.AssetRipperv1.3.14
GUI Application to work with engine assets, asset bundles, and serialized files.
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Resource HackerAngus Johnson
AngusJohnson.ResourceHackerv5.2.8
Resource Hacker is a program that allows you to compile and decompile various resources and file types.
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APK Editor StudioAlexander Gorishnyak
AlexanderGorishnyak.APKEditorStudiov1.7.2
Powerful yet easy to use APK editor for PC and Mac.
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Reko decompilerjklSoft
uxmal.rekov0.12.1.0
Reko is a binary decompiler.
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I
ILensTadis
Tadis.ILensv6
MCP server for inspecting compiled .NET assemblies.
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jadxSkylot
Skylot.jadxv1.5.5
Command line and GUI tools for producing Java source code from Android Dex and Apk files
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C
ChampollionOrvid
Orvid.Champollionv1.3.2
A decompiler for the Papyrus script language used in Skyrim, Fallout 4, Fallout 76, and Starfield. It aims to produce a Papyrus Script file (.psc) from a .pex binary file. The decompiled script should recompile to a functionally equivalent PEX binary.
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GM8DecompilerOpenGMK
OpenGMK.GM8Decompilerv2.2.0
A decompiler for GameMaker 8.x executables
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JD-GUI DuoNicolas Baumann
Nbauma109.JDGUIDuov2.0.112
A 2-in-1 Java decompiler based on JD-Core v0 and v1
