Overview
A Heavy Soldier and its super variant compared side to side.
Super Units are a variation of normal units that can only appear in the Survival game mode. They can only be produced and used by the game's AI, meaning that they're used solely offensively. Their appearance is exactly equal to the normal variation of the unit, with the only difference being the fact that super units are twice as big and strong as the original units.
These units start coming around wave 18 and can be quite tricky to kill in higher waves. The most recommended strategy is to use Heavy Tanks or Snipers to kill them off quickly, or even Nukes in upper waves.
There are only five units that can be found in their super variations currently, those being the Heavy Soldier, the Juggernaut, the Heavy Plane, the Heavy Tank and the Mothership.