Caleb Walker

Caleb "Cal" Walker is a central character in the game. He is the older brother of the protagonist, Nate, and the only survivor of a special ops team sent in to retrieve WhiteKnight.

In-game
Cal resented the fact that his father was discharged during World War II for cowardice, and strove to prove that he could be a hero. When the Vietnam war started, Cal eagerly volunteered. He was always the first to sign up for the most dangerous assignments, and earned a medal for bravery during the siege of Khe Sanh.

Sent in to Cambodia to recover WhiteKnight, Cal became separated from his men by what he described as "crazies", and whilst escaping the horror was taken prisoner by it's creator, Dr. DuMont. He was kept alive as a test subject after being injected with a syringe of virus and released back into the world as proof of what the infection could do. He was later picked up by U.S forces and taken to a base in Pleiku. He is the reason Nate Walker became involved with the search for WhiteKnight.

During a VC attack on the base, Cal escaped and began to make his way back to Dr. Dumont while spreading the infection in the region. After finding him, DuMont injected Cal with the newly created antidote. When Nate finds the two, Cal shouts at him to let him kill DuMont. The scientist pleads with Nate to spare him, which further enrages Cal and leads to him shooting DuMont in the shoulder. Nate then has the choice of either taking Cal with him or killing him in order to stop the spread of the disease. If the first option is chosen, it is revealed that Cal dies three weeks later. The disease is spread beyond the quarantine zone, possibly infecting the rest of the world. If the second option is chosen, a wounded Cal staggers outside to see his brother and the scientist escaping by helicopter, before he is gunned down by several Marines who arrive at the temple.

Shellshock Nam 67

Cal is the protagonist you play in Nam 67 and this game story show's you how he came to lead his own special unit.