Still playing Wolfenstein 3D era games to this day; this 'Depth Dwellers' I also discovered later than it's release, early this century: You have to save lives as well as take them, which was very innovative on such a primitive 3d engine design (very similar otherwise to Wolfenstein 3d's engine). Somebody should update this baby, as controls and DOS-only are pretty wonky. But I still like to play this oldie too, and I think it should be Preserved here :-)