Please remember that Duke Theft Auto is a standalone mod being created in the Eduke32 (Richard Gobeille AKA TerminX) version of the build engine. (Ken Silverman) What this means is that you will not need to own Duke Nukem 3D to play it because it will not be using any of the Duke Nukem 3D resources.
The best ETA I can give for a public release is around June, maybe later or sooner depending on how things turn out. There is a Alpha version that is available for download, but I do not support this version any more and you need to own Duke Nukem 3D: Atomic version in order to run it. ("DUKE3D.GRP" in the same folder as the extracted .rar file) The Alpha can be downloaded from here.
Also, these are the other links that Duke Theft Auto progress can be monitored at:
These are some WIP videos:
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