The "Heavy Weapons Guy" (also known as Heavy) is one of the 9 classes from Team Fortress 2 that first appeared in Cooking with Bowser & Mario 2 and later on in R64: Mario for Hire. In these, his unofficial name is Garry. He always appears in Gmod and there are a lot of bloopers that contain his voice clips, without him appearing himself. Mario often uses the voice clips.
His favorite food by far is a "Sandvich", as he is seen in Cooking with Bowser and Mario 2 chasing after one hanging in front of him.
Heavy appears for a third time working at the office, the one Mario was working at. After Mario steals Heavy's sandwich, Mario blames Luigi and he attacks Luigi. Later, after Luigi hits Heavy's Minigun, "Sascha", Luigi blames Mario for touching his gun, and so he attacks Mario.
After Mario gets Heavy to crash into a wall beacause of a spagetti machine, Heavy angrily gets out and intends to attack Mario, but believes Mario is part of the RED team due to him wearing red. He takes Mario to the badlands and has him help defend the intelligence. Later, after seeing the damage Mario has done, Heavy drops him off back at the spot where he found Mario and tells him to never come back.
He was seen playing basketball at the beach. As Mario arrives to cheer him on (and attempted to shock him with a Joy Buzzer) and calls a Hi-5, Heavy agrees. As the Heavy hi-fives Mario, his hand was suddenly blown off. As Mario realized that he set the buzzer's "Powah" in 1000mA, the Heavy pulverizes him off-screen.
During the challenges, Heavy is not seen mainly until Floor Four, where Mario's fourth challenge is "The Bullseye". He is one of fifty-eight remaining participates. After watching Meggy hit the target with ease, he also attempts at hitting the target. With only three shots avalible for this challenge, he uses a sniper rifle. Both of his first shots were misses. Heavy then gets frustrated over how complicated the challenge was and uses his minigun for his third attempt. He successfully hits the target using his mingun, but is booted out (literally) from the competition by Mario for using his own gun.