Tip of the Spear - Digging In

You'll want to stay on the lower deck for the most part, as it offers more protection.

Protect the Assault Derricks While they Deploy the Grindlifts

Alright, you have one final stand to make before the next level. We strongly suggest keeping off the turret (as it makes you a large target), and instead take cover by the railing on the lower deck and shoot the enemies in the field below. After a minute or two, a mortar crew will appear on the right side (as marked by an objective)—take them down as soon as they appear! If they fire off a mortar, quickly move to the opposite side of the vehicle in hopes of avoiding the resulting hail of destruction. If you need a better vantage point, try climbing the ramp with the turret, though you're also more vulnerable—we suggest heading back down when the Boomers show up. Also, be prepared for an enemy or two to climb on board—the chainsaw was made for this. If you need additional ammo at any point, you can find more on either side of the ramp, one of which re-spawns continually (so don't worry about running out).

Destroy the Reavers

A pair of Reavers will eventually show up. The fastest method to take them down is to use the Mortars and fire them at maximum distance, otherwise your guns work too, though it can take a while.