Engineer

The Engineer is one of the playable characters in Risk of Rain 2.

How to Unlock
The Engineer is unlocked upon completing the challenge "Engineering Perfection" (Complete 30 stages.)

Tips

 * Getting several Bustling Fungus and stacking Turrets on top of each other is a great way to cheese certain bosses. This isn't as effective on the Magma Worm as it tends to knock the Engineer out of the healing radius or outright destroy the turrets, but the Turrets' auto-aim may make this boss easier to fight nonetheless.
 * A single Hardlight Afterburner can allow for 100% uptime of Bubble Shield.
 * Stacking Bandolier can lead to a constant up time of your Bubble Shield, allowing for good cover from Wisps and Titans/Colossi as the game progresses.
 * Pressure Mines can be stuck onto the outside surface of the Bubble Shield, as well as other players and friendly entities such as Utilities.
 * Leeching Seed is a high priority item, as it heals your Turrets as they deal damage.
 * You may sprint while Bouncing Grenades is charging up. Deploying Bubble Shield will not stop sprinting.
 * Acquiring Rejuvenation Rack, N'Kuhana's Opinion, and as many Bustling Fungus as possible will allow your turret's to spawn many of the flaming skull projectiles as you and both your turrets will all heal each other causing N'Kuhana's Opinion to proc.
 * TR12 Gauss Auto-Turret will not receive new items their Engineer picks up after deployment. Their items over only updated upon redeployment.

Trivia
Engineer was one of the playable characters in Risk of Rain.