Jack Griffin

Sgt. Jack Griffin is a tough, gung-ho Marine who was stationed at the military base in Pleiku. He helps Nate in the search for WhiteKnight and is the first NPC to speak in the game.

In-game
Nate first meets him in Pleiku, where the Sergeant tells him to "man up... maybe today you'll become a man." He tells Nate a little about WhiteKnight and introduces him to his brother, Cal, who has succumbed to the virus. They are about to question him, when VC attack the base and Cal escapes. Griffin escorts Nate through part of the town, before leaving to go find them some transport for the trip into Cambodia. He reappears later in a truck and rescues Nate from Nguyen Trang. The two make their way into the quarantine zone, before Griffin lets Nate off at a road block and drives away. He is not seen again until the level Trip, where he flies in with a helicopter and saves Nate from the Infected. However, he is bitten by one and very quickly begins to turn rabid. He ends up attacking the pilot, causing the helicopter to crash and leave Nate stranded. As the protagonist attempts to find friendly U.S forces, Griffin jumps on him. Nate beats him off, and Griffin retreats into the jungle.

He is seen again in a cage at the VC prison camp, where Trang throws the captive Lt. Halley to him to be devoured. During Payback, Nate sees Griffin stumbling around through the underground tunnel system. While Trang is holding Nate at gunpoint, Griffin leaps at him and is shot three times before running out the doorway. As Nate makes his escape in a helicopter, Griffin runs to the landing zone holding Trang's severed head and screaming. He is then killed by a group of Viet Cong, having saved Nate's life for a third time.