

Your placement of the Sentry determines the effectiveness of the enemy's advancement. For this, you may need assistance from a teammate.
TEAM FORTRESS 2 WIKI MEDIC UPGRADE
On offense, you must plant your Sentry and upgrade it faster than the enemy can take it out. For defense, place your Sentry where enemies constantly pass through (Ex: 2Fort - opening in metal grated ceiling above main hall and 2nd floor on courtyard).

Before building one, you may want to put up a Dispenser first because it gives you Metal and supports your team. It is a stationary damage dealer used primarily to defend an area. The Sentry Gun is the Engineer's best source of damage. The Gunslinger provides 150% build speed and turns your Sentry Gun into a Mini-sentry which has 100 HP, costs 100 metal instead of 130, and deal 4 damage per bullet instead of 16.

TEAM FORTRESS 2 WIKI MEDIC FULL
The Wrangler gives the Engineer full control of his Sentry Gun and a 66% shield (Regular Sentry Guns effective health becomes 648 and Mini Sentries effective health becomes 300) while also slightly increases firing speed. The Wrangler and Gunslinger are perfect together and separately. The Stock Shotgun is ideal for most situations, especially for point-blank shots. Damage is converted to metal at a 1:1 ratio, rewarding good aiming with the removal of reloading. The Widowmaker uses 30 metal instead of ammo and clips. Upon the destruction of the Sentry gun, these stats are converted to crits and are lost upon death. The Frontier Justice stores revenge crits that collects on Sentry kills and Assists and Sentry deaths. The Rescue Ranger fires healing bolts that heals friendly buildings, it is very popular in Mann vs. Here are a few pointers to successful Engineering. He provides ammunition, health, transportation, and defense to his teammates on the field. The Engineer is a crucial class of any match.

Spies pose a threat to an Engineer with their Sappers, which are made specifically to destroy Engineer's buildings. However, this makes them an easy target for Snipers given the Engineer's tendency to stay in one area. An Engineer will usually spend the majority of his time tending to said buildings with his Wrench, in order to level them up and repair them. A good Engineer can be strategize where the optimal places are to put his buildings, making him vital to the team. Nests are tightly packed areas containing a Sentry Gun, a Dispenser, and Teleporter close-by. The Engineer's tools can be used to the player's advantage in many ways, one of which are "nests". The Engineer is undeniably the workhorse of any good team defense, but he does have offensive capabilities as well, although limited when compared to his defensive power. He speaks in a thick, distinctly Texan accent, and is reported to hail from Arlington, Texas, USA. The Engineer is third in the Defense Category, and is marked by his yellow hard hat, welding goggles, single work glove, skin-colored dirt, overalls and toolkits.
