Deep Freeze is a big mod with its own storyline for Duke Nukem: Manhattan Project (DNMP). At the moment Deep Freeze is still in development. The Early Access version contains 4 levels of the main storyline of the mod (out of 10 planned), and also 17 separate maps from the alpha version. The DNMP level editor (PrismEd) and alpha maps are included with the mod. The mod’s developer, Vitaliy Bondarenko, sends word that he has spent quite a bit of time and effort on this project, and you can show gratitude for his many years of dedication by supporting him through Paypal donations here.