"I'd explain it all to you, but a demonstration would be more useful"
The Engineer is a master of mechanics and utilize explosives, gadgets, elixirs and turrets to their disposal. The role is that of a supporting class using their array of items and skills such as turrets to help with crowd control.
They can only use one weapon at a time but they are offset by being able to equip special utility and healing kits which will provide them with special weapons and items such as backpacks loaded with different set of skills to replace their main skill set.
This is the first time in the Guild Wars series that the profession has been available. Area Net revealed the Engineer on May 19th, 2011.
See the main article, Engineer Skills
 Backpack Kit
These kits are a utility that allows for new skills to be used and replaces the Engineers current weapon skills for more specific skills.
|Bomb Satchel||A satchel that lets you throw bombs|
|Grenade Satchel||A satchel that allows you to throw grenades|
 Weapon Kit
The weapon kits are utility skills that allow the Engineer to equip new weapons which also come with their own set of unique skills.
|Flamethrower||A short range AOE kit|
A turret is a deployable item at the Engineers disposal to help with crowd control. When deployed the slotted skills are replaced with an overcharged version. In an excerpt from Guild Wars an example is given as;
an engineer can deploy a Thumper Turret to cause AOE damage, and then activate the overcharge version of that skill for a big thump attack that knocks down nearby enemies
 Two Handed
 Main Hand
 Off Hand
Related ThreadsKilling the engineers in Mission #6 - last post @ Aug 26, 2002
How to make a NUKE silo, weather contol etc. capturable with an engineer? - last post by @ Mar 3, 2010