The Berserker is a Ranger that would rather use a chainsaw and 2 meat cleavers to take out his enemies than use a gun.
The way the Berserker looks is a huge muscular man with a wide head kind of like Kingpin from the Marvel Comics.
Their armor is made of metal with leather on the inside almost like a modern day knight so when they run into a horde of the undead they can take a lot of hits with out being infected.
The main stats for a Berserker are Strength and Stamina. Strength gives the Berserker plus attack and plus armor and Stamina gives plus health and how long their rage can last.
The resource that the Berserker uses is rage that when they get 100 rage they can hulk out and do a maniacal trashing type attack that increases their damage and attack speed but increases how much damage they take from enemies.