You can import your save progress from the Steam version to the Switch, though this is a one-way street (Switch to Steam is not supported). Game Modes and Gameplay Zombie Army 4: Dead War Review - A MINDLESS SHOOTER?

: Ensure you have at least 7 GB of free space on your SD card for the base game and initial updates. Why Play Zombie Army 4 on Switch? Zombie Army 4: Dead War Review: A dish best served in co-op

: The survivors eventually realize Hitler was never fully destroyed, only banished. They must descend into Hell itself to sabotage war factories and use the Sagarmartha Relic (or Agartha Relic) to end the nightmare for good.