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Sergeant Gannon "Destroyer" Roark, is the heavy weapons specialist of the Rapid Response Tactical Squad and one of the supporting characters in the 2005 film Doom.


Despite his scowling expression and reserved nature, Destroyer is shown to be a good person and having mutual respect from his peers. Not much is known about his personal life, other than being childhood friends with Duke. He is first seen playing baseball with Mac.

When the group arrives at the Olduvai Research Facility on Mars, Destroyer is paired with The Kid. Later, while paired with RRTS leader Sarge, he hears a strange noise coming from the air vent. Moments after opening it, he shoots multiple times at a escaped lab monkey who startles him.

Following Goat's death, Destroyer and Dean Portman guard the door that separates the Arc chamber from the quarantined area. Their pairing is short-lived when Portman decides to go to the bathroom, leaving Destroyer to guard the door alone. Moments later, Destroyer hears another strange noise that leads him to the holding cell that was first discovered by Goat and Portman. Destroyer is immediately attacked by the Hell Knight, and the two give fight. Even after being electrocuted several times, Destroyer gains the upper hand when he attempts to climb out of the holding cell on a hook and chain that is hanging from the ceiling. However, the Hell Knight yanks the chain which causes Destroyer to loose his grip and fall to his death. Destroyer's body was recovered by the RRTS and taken back to Dr. Samantha Grimm's laboratory for an autopsy.