The Tim, the tool man, Taylor of the Team Fortress universe, the Engineer has the ability to build powerful weapons, as well as supply stations to help their teams (called dispensers) The engineer's remote sentry guns are the ultimate in home defense, and can really break apart an enemy charge.
To build a sentry gun, make sure you've collected plenty of metal (armor) and pull up the "build" menu (accessed through your "special skill" key). Once you've built your sentry gun, you can hit it with the wrench to or add ammo or upgrade it with stronger armor and weapons. You'll need to collect ammo packs to do this, so be sure to stock up.
This is a real specialty position, and should not be one of the first classes that a beginner should play. Games are won and lost on the engineer's placements of sentry guns. As the engineer, you should also assist in the distribution of ammunition to other defensive positions, such as the Heavy Weapons Guy.
Weapons: Railgun, Double-Barreled Shotgun, Wrench, ability to create Sentry Guns
Grenades: Hand Grenades, EMP Grenades
Speed: Medium
Health / Armor: 90 / 25 (max armor 50)
Special Skill: Pulls up "Build" menu
Positions: Defense all the way. On the rare occasion when you take control of the enemy base, and have more than one engineer, you may be able to build a cannon and dispensary smack dab in the middle of hostile territory.
