Dead Space 3 (Xbox 360)

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Devil's Horns (Foam Finger Weapon)

Complete the game on Classic Mode.

DLC Awakened: Various Achievements

Complete the following achievements to unlock Xbox Live Gamerscore points.

AchievementHow to unlock
Bad Moon Rising (50 points)Complete Dead Space 3 Awakened.
Get to the Chopper! (50 points)Awakened: Escape from Tau Volantis to the Terra Nova.
Heaven Can Wait (20 points)Awakened: Stasis your Co-Op partner when he is downed to slow his bleed out timer.
Heretic (20 points)Awakened: Kill the Unitologist Cult Leader.
Just the Tip (20 points)Awakened: Craft a weapon using a MK-II Weapon Tip.
Pure Lunacy (50 points)Complete Dead Space 3 Awakened in Pure Survival Mode.
Supercharger (20 points)Awakened: Finish charging the reactor in under 90 seconds.
True Believer (20 points)Awakened: Allow the Unitologist Cult Leader to survive.

Flight Suit

Collect all 40 artifacts.

Item Duplication (Cooperative Mode)

You can perform this cheat anywhere in the game, but it works best if you put it to use near a checkpoint and bench. You'll need to be playing with a friend, preferably one who is equipped with a headset so that you can communicate as needed. Start by giving your friend the items you wish to duplicate. After the trade is completed, exit out to the main menu and then immediately have the friend who received your loot save and quit from the pause menu. The trick only works if you follow that precise order, and quickly. If you did it properly, both players should now have the desired items in their inventory.

Log Collection Unlocks

You'll gain access to additional gear by collecting the various logs in Dead Space 3.

Comms Circuit Set - Collect all Audio Logs
MK-II Overclocked Module Set - Collecting all Logs
Research Circuit Set - Collect all Text Logs

Planet Cracker Plasma Cutter

Have a saved game file from Dead Space 2 to get the Planet Cracker Plasma Cutter when you reach the first workbench.

Retro Mode

Complete Hardcore Mode.

S.C.A.F. Deep Dig Suit

Collect all weapon parts.

Secret Achievements

Complete the following achievements to unlock Xbox Live Gamerscore points.

AchievementHow to unlock
Aliens (15 points)Collect all Alien Artifacts.
Close Encounter (10 points)Kill 10 alien Necromorphs.
Critical Mass (15 points)Recover the shuttle.
Drill Sergeant (30 points)Complete the Drill Room without taking any damage.
Hungry (20 points)Reach the pump room of the Waystation without alerting any Feeders.
Hydra (15 points)Kill the Snowbeast.
Infernal Machine (15 points)Reach the Alien Machine.
Intestinal Fortitude (25 points)Defeat the Hive Mind.
Shoot for the Moon (50 points)Defeat the Moon.
Snow Crash (15 points)Reach Tau Volantis.
Space Ace (20 points)Shoot at least 70 targets during the ride to Tau Volantis.
Space Odyssey (15 points)Survive your first spacewalk.
Stranger in a Strange Land (10 points)Complete the Prologue.
Together as One (15 points)Reassemble Rosetta.
Under a Buck (10 points)Shoot the deer head trophy in the Admiral's Quarters.
Weedkiller (30 points)Kill 5 Cysts in the Biology Building with a single poison gas cloud.

Various Achievements

Complete the following achievements to unlock Xbox Live Gamerscore points.

AchievementHow to unlock
And Then We Doubled It! (10 points)Dismember 1000 limbs from living enemies.
Architect (10 points)Share a Blueprint with your Co-Op partner.
Aren't You Thankful? (50 points)Complete the game on Hardcore Mode.
Axes High (20 points)Kill 30 enemies using Fodder axes.
Blast Corps (10 points)Kill 30 enemies with explosion damage.
Circuit's Edge (10 points)Add a Circuit to a Weapon.
Dropping Acid (10 points)Dissolve 50 enemies with acid.
EMT (25 points)Craft a Large Med Pack.
Electric Lawnmower (10 points)Kill 30 enemies using an electrified Ripper blade.
Empty Chamber (10 points)Kill 30 enemies using melee strikes or a melee Weapon Part.
Epic Tier 4 Engineer (40 points)Complete the game in Classic Mode.
From the Jaws (10 points)Save your Co-Op partner from an execution by killing the attacker.
Full House (25 points)Craft a Weapon with 2 Tools, Tips, and Attachments with all Circuit slots filled.
Get On My Level (10 points)Complete the game on any difficulty setting.
Ghosts of the Past (25 points)Face all of Carver’s demons by completing all Co-Op only optional missions.
Go for the Limbs! (10 points)Dismember 500 limbs from living enemies.
Gun Collector (25 points)Collect all Weapon Parts.
Master Plan (25 points)Create a Blueprint that needs at least 2000 resources worth of parts and Circuits to build.
Medic! (10 points)Revive your Co-Op partner 10 times.
Metal Detector (30 points)Successfully deploy Scavenger Bots to 15 Resource Areas.
My Buddy (10 points)Retrieve Resources from a Scavenger Bot at a Bench.
Overpowered Healing (10 points)Use quick heal to heal yourself 20 times.
Payback (15 points)Kill a Soldier by TK'ing a grenade or rocket back at them.
RIG Master (50 points)Fully upgrade your RIG.
Share and Share Alike (10 points)Use the RIG to give an item to your Co-Op partner.
Shootbang (10 points)Kill 30 Soldiers with head shots.
Slow Mo (10 points)Kill 50 enemies while they are in stasis.
Strapped (10 points)Craft a Weapon.
Survivalist (40 points)Complete the game in Pure Survival Mode.
The Armorer (25 points)Collect all Circuits.
The Explorer (25 points)Complete all optional missions.
The Librarian (25 points)Collect all Logs.
The Professor (25 points)Collect all Artifacts.
There's Always Peng! (50 points)Find Peng.