The most common types of Knights are the Knight Paladin and the Knight Errant, both based on the same chassis but equipped with different weapon arrays. This particular chassis is often used due to its flexibility. The armoured leg plates protect the machine from infantry units, but still give it enough speed and agility to use its deadly Shock Lance. These types of Knights are equipped with special close combat weapons and are regarded as expertly skilled in their use. This capability is supplemented with ranged weapons powerful enough to blast even heavy vehicles from afar and to mow down infantry formations. There were several different types or patterns of Knights used on the Knight Worlds.
Knight Paladin - The Knight Paladin is the archetypal Knight walker, usually armed with a large calibre Battle Cannon and a giant Knight-sized Chainsword. The Battle Cannon possesses a long range and is capable of piercing even a true Titan's armour. The Chainswords used by Knight Paladins are described as being easily as destructive as the close combat weapons used by the larger Warhound-class Scout Titans, capable of harming even an Imperator 's armour plating.
Knight Errant - The Knight Errant is based on the same body as the Knight Paladin, but serves a more specialised purpose. Armed with potent Thermal Lances, it is highly suited to attacking large targets such as Chaos Titans and even Mega-Gargants, vaporising steel and flesh with equal ease. Like the Knight Paladin, the Knight Errant is also equipped with a close combat weapon supplementing its visor-mounted Shock Lance, although this pattern's most traditional armament is a Power Gauntlet. With such a weapons load-out, the Knight Errant is capable of inflicting notable punishment upon the largest of vehicles.
Knight Lancer - The Knight Lancer is a variant of the standard Knight suit that has been designed for speed and agility. The Knight Lancer is most usually used to perform scouting actions, outflank enemy forces and distract them while heavier units can position themselves to attack. The Knight Lancer is equipped with a Battle Cannon to give it long range fighting capability, but its true armament is the Power Lance. The Power Lance is a relatively simple upgrade to the standard Shock Lance that is mounted on other Knight patterns. It operates by intensifying the bolt of energy normally expelled from Shock Lances, changing it into a searing arc of lightning capable of rending all but the strongest of armour plating and causing havoc in enemy ranks. The Power Lance has a very short range, but its nature makes it the perfect weapon for hit-and-run attacks.
Knight Crusader - The Knight Crusader alongside its counterpart the Knight Castellan are the heaviest types of Knight manufactured by Mechanicus Forge Worlds. These Knights are slower and less nimble than their kin, but benefit from much heavier weaponry and increased firepower as well as considerably thicker and sturdier armour plate. Because of their great bulk, the Crusader and the Castellan cannot move fast enough to generate the charge needed to fire a Shock Lance. Instead, they are used in a fire support role, providing covering fire for the other Knights and allowing them to charge in and engage the enemy in melee, whilst also picking off threats to the main force from a safe distance. The most common and notable feature of these Knight patterns is the modified shoulder-mounted Quake Cannon -- a massive artillery piece most often found on Warlord-class Titans or mounted on Imperator-class Titans' carapace hardpoints, capable of destroying Titans and entire buildings alike. The Knight Crusader supplements its Quake Cannon with a twin-linked Lascannon, used to destroy armoured targets at extreme range. Coupled with the Knight Crusader's excellent frontal shielding, this combination makes for a deadly fire support unit.
Knight Castellan - The Knight Castellan is identical to the Knight Crusader in every respect but one: rather than using Lascannons, the Knight Castellan supplements its weaponry with a multi-barrelled Autocannon. Although this weapon is relatively short-ranged, the hail of shells it delivers can easily cut down swathes of most enemy infantry and light vehicle units, or strip a Titan of its Void Shields in an instant.
Knight Baron - The Knight Baron is piloted by a superior warrior with razor-sharp combat and Knight-handling skills. A Baron Knight usually leads a Knight squadron into battle. As a sign of their command and societal status, every Baron uses a Knight custom-built to their exact specifications. This Knight pattern's armour plating is thick and resilient, and heavily decorated with House symbols and fluttering pennants in the colours of the Baron's estates. A Knight Baron is usually armed with a Battle Cannon and the destructive Power Lance, usually only found on Knight Lancers -- which also means that despite its exceptional sturdiness, the Knight Baron's armour is light enough to allow the machine to move fast enough to generate the charge necessary to operate the weapon, and to keep up with the charging Knight Lancers. In battle, the Knight Baron leads the assaults of his kinsmen, crashing through enemy lines like a bolt of lightning with his followers hacking into the foe around him with redoubled pride and fervour.
Knight Warden - When a member of a Knight House reaches old age, he is allowed to retire, passing his armour down to his eldest descendant and instead donning the suit of a Knight Warden. Wardens are charged with defending the family household and serving the members of their House with sage advise. Although no longer as quick as their younger kin, their experience and expertise more than make up for this falling. Wardens are armed with long-ranged, heavy weapons and are well-armoured, but are not equipped with Shock Lances. A Squire cannot become a Warden, and must at least be a full Knight. Those who proceed to attain the rank of a Lord or are already Lords when they retire are instead reffered to as "Seneschals". A Warden's battle armour is always painted almost entirely white, with only a single plate painted in a fashion adequate to the individual's rank.