Kill a player flying a Vulture pack by ramming them with your Hawk.

Complete mission 5: "Ballard's Crossing"

Shoot the driver, passenger, or gunner out of a Razorback.

Win your first multiplayer game.

Complete mission 4: "The Pipeline"

Kill an enemy with a melee attack.

Defeat the mech in "Harvest Season"

Complete mission 2: "The Freightway"

Use Build & Battle for the first time in the campaign.

Collect 50 Metal Head Skull Gems

Destroy Turrets in Sewers

Blow up Ammo at Fortress