"Nothing gets in the way of the Giant Cannon. It's mammoth-sized cannon balls push past anything and keeps going and going and going..."
The Giant Cannon is a single-target defense that shoots a large cannonball with a piercing effect, able to hit multiple troops and knocks them back. The cannonball slows down the further it travels. It is unlocked at Builder Hall level 7.
It has a low fire rate but deals moderate damage per hit.
The Giant Cannon has a lock-on range of 9 tiles but the fired projectile can travel 48 tiles.
You can put a Giant Cannon behind other buildings to assist their defense - it can hit all ground units in a row. This is especially true for strategies which utilize Raged Barbarians where a player attempts swarms their army into the center of the base.
Putting this near the Builder Hall makes Troops uses longer time to attack it due to the repel distance.
The Giant Cannon can deal damage to both a tank and their support troops as long as they are lined up.
Try to spread out your troops so they are not in line with the Giant Cannon; otherwise, the Giant Cannon will be able to hit all of them at once.
Use the slow fire rate to your advantage by baiting it to shoot a few troops then swarming it with other troops before it can shoot again. Only use this if you don't have tanks to take it out and if the Giant Cannon is not guarded by a Crusher.
The Boxer Giant and Battle Machine are good tanks against a Giant Cannon. They both have high hitpoints and will be able to survive many hits from the Giant Cannon.
The Giant Cannon undergo significant visual changes at levels 4, 5, 7, and 8.
At level 1, the Giant Cannon appears to be a cannon on a wooden platform strapped with ropes.
At level 2, the ropes disappear. The Cannon also looks more sturdy.
At level 3, pieces of metal are added to the back of the Cannon.
At level 4, the circular rims on the Cannon turn bronze, along with the pieces of metal added at level 3.
At level 5, the Cannon turns bigger and is shaped like an octagon. Also, the added metal disappears.
At level 6, the front and back of the Cannon gain bronze outlines.
At level 7, the main body of the Cannon turns darker, along with the inside.
At level 8, the bronze rings at the front and back get wider.
At level 9, a black layer has been added and it has been reinforced by metallic bars. It also gets gold piecing on the legs.
Its cannonball mechanics could be inspired by a Clash Royale card, The Log.
Any troop that would be destroyed in one shot by the Giant Cannon will be sent flying off the battlefield instead, in a similar fashion to the Spring Trap and the Super Archer.
The Giant Cannon was added on 29/09/17, along with Builder Hall 7.
The Giant Cannon's cannonball does not actually travel forever. It travels a total distance of 48 tiles - though this cannot easily be observed unless the Giant Cannon is placed near one end of the base and it subsequently fired a shot towards the other.
If the Giant Cannon destroys the Battle Machine near a Wall, the Master Builder will remain on the Wall frozen in a hung position with his arms down. The battle will not end automatically even if all other troops are killed. The Master Builder will remain in the frozen position until time runs out. In battle replay, the Master Builder can be clicked like any other troop despite the Master Builder not being considered a troop itself.
The description of the Giant Cannon has a grammatical error, saying "It's mammoth-sized cannon balls..." instead of "Its mammoth-sized cannon balls...".
Interestingly, the Giant Cannon does less damage than a regular Cannon despite the cannonball being bigger than the cannonball from the Regular Cannon.
There used to be a bug where the Giant Cannon can instantly destroy a Battle Machine within one hit, due to the cannon's fired projectile colliding with the Battle Machine's sprite multiple times within a short session.
A Cannon Cart with its "Last Stand" ability being shot by a cannonball from the Giant Cannon may be repelled and can't attack the target. It may turn the target but it may not have enough time to attack. This would be frustrating if the Cannon Cart was attacking the Builder Hall and being repelled when the Builder Hall has only few HP left.
Tapping this icon displays information about the Giant Cannon, such as Level, Damage Per Second, Hitpoints, Range, Damage Type and Targets.
Tapping this icon begins upgrading the Giant Cannon to the next level, if you have enough resources and a free Master Builder or O.T.T.O. When the Giant Cannon is at maximum level, this icon is not shown.
Tapping this icon instantly upgrades the Giant Cannon to the next level, at the cost of one Hammer of Building if you have one. When the Giant Cannon is at maximum level, or the Builder Hall requirements for the next level are not met, this icon is not shown.
Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.
Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.