The Opposition Heavy Soldier, referred to by KronoteK agents simply as the Heavy is the toughest character in the game.They are much more durable than their regular counterparts and pack a bigger punch.
The Heavy is by far the most difficult enemy in the game to fight. Equipped with heavier armor and far-superior shielding as compared to their regular comrades, it takes no less than a full magazine of AR-55 ammunition to bring one down, even with upgrades.
Keeping on the move and taking advantage of cover at every opportunity is recommended when fighting a Heavy, as their multipurpose weapon, which appears to be attached directly to their right arm, is capable of delivering both a withering barrage of rounds, as well as firing a rocket-propelled grenade towards the player's position with unerring accuracy.
When firing, their weapon will emanate an extremely loud buzz that can be heard clearly from even a great distance. Whether this is intended as a form of psychological warfare is unclear due to lack of information. When firing an explosive, the weapon will emit a short whirring noise before firing.
Encountered in both parts of the "The Vesuvian Man" mission armed with a multipurpose heavy weapon that cannot be obtained by the player.