Put the files in to the duke 3d file and play.This is my second editing job.My first I will probly not release.In this file it will change the sound of the pistol,rapid fire gun,rpg explosion,and others.It makes the game harder.For examle, the Assault trooper now takes 6-7 hits instead of 3.You get less ammo,less armer,some more powerful guns,stronger enemys,max of 150 life, and other things to make it a lot harder.