Engineer

Engie, or engineer is another playable class. He starts with 125 health and with a pistol. His ability to throw sentries into combat with a variety of weapons with special affinities make him a all round character. He a technical boi with aimbotting sentries. He a smart man.

Stratagy
His low health makes him like a slow scout, so dont get hit. His PDAs are very important for the sentries and when equipted with ammoleach, you can simply created unlimited sentries with all the metal produced. Be aware that sentries can also damage you too, so don't get in their line of fire. Dance around your turret, reflecting projectiles that may destroy it.

The Rescue ranger is helpful to keep sentries alive, but are worthless in combat. Pistols are powerful when equipped with a multishot.

Location
Engie is hidden in the mountain lab, strumming his guitar. When normally encountered, he requires the player to bring him 'more gun'. When brought, the Brass Beast, the Texan will join your team.