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This is a Xdelta3 patch that can downgrade Indy3d.exe from the GOG version of the game (Steam is untested but should still work) to the 1.0 version, which is identical to the one found on the retail release. Users will need to provide their own Indy3D.exe file. The purpose of this patch is to allow the digital distributions of the game to be used for the Open Jones 3D Engine which is an open source engine made for the game. Although the engine is compatible with the Steam and GOG releases, Version 1.0 of Indy3D.exe is a hard requirement to use the engine and can only be obtained from the retail release. This patch makes it so it can be obtained by downgrading the file instead. How to use Download and extract the xdelta file somewhere on your PC Go to this Online Delta Patcher. For "Source File" navigate to <path-to-game>/Resources and choose Indy3D.exe. For "Patch File" navigate to where you extracted the Xdelta file and select it. Click "apply patch" and download the new exe file. Rename the downloaded EXE file to Indy3D, and navigate to <path-to-game>/Resources. Backup the original Indy3D.exe first then replace it with the new EXE. You can now use the game with the Open Source Engine by following the instructions on its GitHub page. Verifying the patched file: The patched file should have this SHA-256 Hash: 3fbaf8cd401b4af80967cbe42e3420fb803288b336ebbe72a9a01b6dfd661a53

Infernal Machine is a very old game that stores its settings in the registry. Some versions may experience some settings not saving and defaulting back to the previous settings every game startup. This is because the game is failing to write to the registry for some reason. The Reg files contained here will change the settings that tend to not save properly, to their max values. This will result in the game being set to max settings by default at every game startup. Note: This will not change any user configured values such as control set, difficulty, hints, map rotation, subtitles, resolution, and having Indy run by default. Those for the most part still properly function, these only change the settings I noticed do not get saved. What the reg files do: Sets color depth to 32-bit Color. Enables Trilinear Filtering. Sets performance to "Very Fast." Enables Triple Buffering. Disables fog entirely. This is because it can cause everything to turn grey on some systems. Enables 3D Sound. (You will need a DirectSound wrapper for this, otherwise the game will always force off) Installation: Note: Two files are provided for the disc version of the game; CD and CD Alt. They save to two different registry paths. Try the other if one does not work. They are only for the disc version. Download the archive and extract the reg file corresponding to the version of the game you have (Steam, GOG, or CD/Disc). Double click on the reg file. If that does not work, open the reg file with the Registry Editor. The files can be opened with any text editor to view its contents.