<P> In regards to gameplay, Nazi Zombies retains the wave - based survival formula that have been used in all previous Zombies entries, with brand new additions . A class system is introduced, where players can opt for one of four combat roles: Offense, Control, Medic and Support, which provide different in - game abilities . Class loadouts are also included, with equippable Raven Mods, which are perks similar to the multiplayer mode . Sledgehammer Games also attempted to rationalize some of the popular mechanics, such as weapon wallbuys and currencies, with realistic explanation that fit within the lore of the game mode . Nazi Zombies includes a hint system, where portions of the main story quest are given directional hints for players to find and progress . In regards to the story quest, Sledgehammer's creative director Cameron Dayton reveals that there is a "casual path" for new and casual players where they can progress with the story, while a "hardcore" path, which is considered the official canon, exists with hidden objectives, and expands more on the story beyond what the casual path contains . </P> <P> On June 6, 1944, U.S. Army Private First Class Ronald "Red" Daniels (Brett Zimmermann) of the 1st Infantry Division takes part in the Normandy landings with his platoon, consisting of Private First Class Robert Zussman (Jonathan Tucker), Private Drew Stiles (Kevin Coubal), Technician Fifth Grade Frank Aiello (Jeff Schine), Technical Sergeant William Pierson (Josh Duhamel) and First Lieutenant Joseph Turner (Jeffrey Pierce). Zussman is stabbed by a German soldier, resulting in his hospitalization for several weeks . </P> <P> Zussman returns to duty in time for Operation Cobra, where American forces successfully push to reclaim the town of Marigny . The platoon is ordered by Colonel Davis (Matt Riedy) to conduct an operation with British Special Operations Executive officers Major Arthur Crowley (David Alpay) and Vivian (Helen Sadler) to intercept a German armored train carrying V2 - rockets . Daniels and Zussman successfully derail the train before being escorted back to their squad by French Resistance leader Rousseau (Bella Dayne). </P> <P> A week later, Rousseau and Crowley infiltrate a German garrison in Paris to retrieve explosives in preparation for the platoon's assault upon it . Midway through, Rousseau kills SS - und Polizeiführer Heinrich (J. Paul Boehmer) in retaliation for his murder of her family . The platoon then liberates Paris . </P>

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