Heavy
A portly Russian bear, the Heavy has the most health in the game, with a total of 300. Not only that, but his primary weapon, the Minigun, does potentially the most damage per second in the game. These come with the downside of having by far the lowest base movement speed in the game, 77% of the standard movement speed, which becomes 37% when his Minigun is deployed; this leaves the Heavy unable to chase down damaged enemies to finish off the kill, and makes it very difficult to dodge high-damage hits such as the Demoman's grenades and stickybombs, the Soldier's rockets, and headshots from the Sniper. A Heavy will most often be found near a Medic, as the extra 150 health buff helps the Heavy soak up more damage for his teammates, while simultaneously protecting the Medic from any Spies or jumping Soldiers that threaten him.
In Sixes
Main Article: Heavy (6v6) Heavy is considered an offclass in 6's, used primarily holding last points in 5cp.
In Highlander
Main Article: Heavy (Highlander)