The SBC Cannon, or just Cannon, is a portable artillery weapon that is capable of mowing down many weak opponents in a row, or dealing heavy damage to tougher enemies. Like the XM214-A Minigun, the cannon is one of Serious Sam's trademark weapons.
The cannon is a marvel of modern weaponry that was originally reverse-engineered by scientist Professor Gottlieb Kiesel from technomagical ordnance
captured from the enemy. The original design has since been adapted and improved, rendering the cannon one of the most powerful infantry weapons available. Balanced to perfection, the cannon’s barrel fires extraordinarily heavy uranium-filled projectiles at high speed, providing excellent penetration and easily smashing through several hostile units in a row.
Rumors persist that the uranium-filled cannonballs can be hazardous to the operator, but Professor Kiesel claims that the effect on the average life expectancy of an Earth Defense Force soldier should be negligible.
As the cannonballs have great piercing capabilities, this makes the cannon very useful for taking down powerful enemies with a single cannonball and multiple weaker enemies when they are lined up. The cannon can attain various levels of power and speed depending on how long it is charged. Low power shots are still capable of piercing through multiple enemies, and dealing heavy damage to stronger ones.
Raahloom, the boss of the Jewel of the Nile DLC, uses a much larger and more modified version of this weapon. The cannonballs fired from his cannon are much larger in comparison to the balls fired by Sam's cannon. Raahloom's cannon can also fire up to five or six balls in succession.
In Serious Sam: Double D: XXL, it is a bit weaker than in other games, but it is still effective. A Gunstack combination of the cannon with other strong weapon upgrades can kill even the strongest enemies with ease.
The cannon is an effective weapon against The General, including the large and monster variants, as fully charged shots are needed to inflict major damage towards it. Enemies such as the T-Mech and Albino Cyclops can be gotten rid of as well.
The cannon can be used to kill a Witch-Bride of Achriman in one shot, though this may be considered a waste of cannonballs for several Witch-Brides, considering the rarity of ammunition for the cannon throughout the campaign. In The Guardian of Time, however, cannonball ammo is rather plentiful.
Back in the early Alpha phases of Serious Sam 1, Sam was supposed to light the cannon's fuse with a torch, then the cannon would charge and shoot out a really powerful cannonball. Files of the early cannon exist in the leaked Serious Sam Evaluation Publisher build, even though the cannon wasn't usable in the build because it wasn't yet finished, although you can pick it up as well as its ammo but you couldn’t select it.
Alternate ammo for the cannon called the nukeball existed at one time. According to its code, it would essentially be a more powerful version of the regular cannonball fired by the cannon. Since the regular cannonball is already ridiculously powerful when charged up, it was probably removed for redundancy.
Its texture is in the final game's files and is an alternate skin for the regular cannonball model. Although in Test 1 it was supposed to be the regular cannon ammo and the cannon's ammo icon was supposed to be like the model (not 1 cannonball), there were supposed to be 3 cannonballs on the ammo HUD icon.