The d3_1.3.1_sdk.exe file you have requested: Tools and Utilities / SDK / DOOM 3 SDK v1.3.1 - Windows - 7.18mb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:

This updated Software development kit for DOOM 3 allows you to modify the game based on the 1.3.1 source code.

We recommend you return to the download list and browse the links from there. If the problem persists, contact us with the details.

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