Double Trouble - Reach the river in Co-op

Made it to the Corinth River in Co-op mode

Let's Go Home - Destroy Stahl's Cruiser

Destroyed Stahl's Cruiser and left the planet on any difficulty

Bring It Down - Defeat the MAWLR

Defeated the MAWLR defending the Space Elevator

You Drive - Drive the Mobile Factory

Took over the controls of the Mobile Factory

Close Quarters Killer - Kill 25 Helghast using Brutal Melee

Killed 25 Helghast using Brutal Melee

Evening The Odds - Kill 500 Helghast

Killed 500 Helghast

Power Spike - Nail a Helghast to an exploding object

Used the Boltgun to nail a Helghast to an exploding object

Go Down And Stay Down - Destroy the ATAC

Defeated the ATAC outside the Stahl Arms facility

Jail Break - Liberate Narville

Liberated Narville from Stahl Arms South

Into The Lair - Reach the cable car

Reached the cable car and gained access to Stahl Arms South

Quick Exit - Escape the Oil Rig quickly

Got off the 2nd Rig within 2 minutes.

ISA TV - Establish communications

Made contact with Earth

Turn The Tables - Melee Kill a Capture Trooper

Killed a Capture Trooper using melee

Spiky Personality - Kill a Helghast using a Burster

Killed a Helghast by shooting a Burster plant

Cagefighter - Kill 10 Helghast using Brutal Melee

Killed 10 Helghast using Brutal Melee

Up Close & Personal - Brutal Melee another player

Used the Brutal Melee move against another player

Medic! - Revive another player

Revived a friendly player for the first time

Save The Intruders - Arc APCs destroyed

Successfully assisted with defeating the Arc APCs

Smoking Wrecks - Destroy all Tanks on Senlin Beach

Destroyed all the Helghast Tanks in the Senlin Beach section

Time For A Dip - Reach the river

Reached the Corinth River with the convoy

In Your Face - First Brutal Melee

Performed first Brutal Melee move

Ready For Battle - Complete weapons training

Completed weapons training in Prologue