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Sink the Horror Electric Complete Quake Episode 1: Dimension of the Doomed in single player.

Friendly Fire Kill a monster with another monster's attack.

Secret Sleuth Find a secret area.

Cagefighter - Kill 10 Helghast using Brutal Melee Killed 10 Helghast using Brutal Melee

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

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

Dress Up Unlock your first costume

Operation! Snare the Shard with the Ishimura

The Librarian Collect 100 logs

Frozen in Time Kill 50 Necromorphs while they are in Stasis (single player only)

Hornet's Nest Destroy the Tripod Nest

Powered Up Complete the Solar Array Puzzle

The Electrician Collect 10 Semiconductors

Shut Down Defeat the AI

The Engineer Collect 10 Schematics

The Graduate Win the fight at the School

Curiosity Killed the Cat Wear the paper bag.

Cat Got Your Tongue? Have B-12 translate a robot.

Torment Me No More Kill the Tormenter

...And Stay Down Kill 25 crawling enemies with Stomp (single player only)

Clever Girls Survive your first encounter with Stalkers

One Small Step Get through the first Zero-G area

First Aid Use Quick Heal ten times (single player only)

Promising Agent Complete the main story on Standard mode or higher.

You're Small Time! Defeat Osmund Saddler.

A Masterpiece Get the exclusive upgrade for a weapon.

You Used to Be a Good Guy Defeat Jack Krauser.

No Thanks, Bro! Defeat Ramón Salazar.

Wave Goodbye, Right Hand Defeat the Verdugo.

Shield Your Eyes Defeat 3 enemies at once with a flash grenade.

Overkill Use a cannon to defeat a zealot.

Grilled Big Cheese Defeat Bitores Méndez.

Talk About Near-Death Experience! Rescue Ashley as she's being carried away by the enemy.

My Preferred Piece Upgrade a weapon.

Harpoon Hurler Defeat Del Lago.

Amateur Shooter Complete a game at the shooting range.

Nice One, Stranger! Complete a request for the Merchant.

Revolt Against the Revolting Destroy a Clockwork Castellan.

Knife Basics Parry an enemy with a knife.

Derailed Survive the Train Sequence

Romper Stomper Stomp 10 Containers

Patient on the Loose Get your first Suit

Shoot the Limbs! Dismember 25 Necromorph Limbs (single player only)