>>11848463NTA but engine wise and feature wise Eradiactor is very close to Build Engine games like Duke Nukem 3D. The rendering engine looks similar, it has many effects that Build Engine games also have, even has the third person view.
It does have the "picture in picture" thing which Build games didn't have and which would probably have destroyed framerate in Build (though admitedly I haven't tried Eradicator with period accurate hardware).