Dead Space 3 (PlayStation 3)

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C.M.S. Greeley side mission

After clearing out the ship, you will reach the end of the objective marker in a room with the gravity panels on either side, with a discharging electrical transformer. Collect the Electro Shot mod access the terminal in the final room. You can also find a circuit behind the door that requires a wrench.

Classic mode

Successfully complete the game. In this mode, only classic weapons through blueprints, there is no co-op mode, aiming is in the original style, and the difficulty setting is locked to hard.

Devil's Horns (Foam Finger Weapon)

Complete the game on Classic mode to unlock this weapon.

DLC Awakened: Various Trophies

Complete the following tasks to unlock PlayStation 3 trophy rewards.

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

Hardcore mode

Successfully complete the game. In this mode, you will be sent to the start of the game any time you die.

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.

Item Exploit

When picking up an artifact, advance to the next location to go past a doorway. Once you have passed the door, let it shut and reopen. Now return to the location where you found the artifact and in its place you should find resources such as the semiconductors, tungsten, scrap metal, transoucer and health packs. You can repeat this trick as often as you like.

N7 armor

Have a saved game file from Mass Effect 3 to get the N7 armor from that game.

New Game+ Mode

This feature will become available when you complete the game once. In New Game+ mode you begin a new playthrough with your previously earned inventory and resources. The following is a list of things that can be unlocked in New Game+ mode.

Unlock +3 Clip Circuit Set:
Beat the game on casual difficulty.

Unlock +3 Damage Circuit Set:
Beat the game on impossible difficulty.

Unlock +3 Reload Circuit Set:
Beat the game on normal difficulty.

Unlock +3 Speed Circuit Set:
Beat the game on hard difficulty.

Unlock Builder's Circuit Set:
Collect ALL 12 Blueprints.

Unlock Comms Circuit Set:
Collect ALL 36 Audio Logs.

Unlock Crafter's Circuit Set & Deep Dig Suit:
Collect ALL 73 Weapon parts.

Unlock Devil Horns:
Beat Classic mode in New Game+.

Unlock Earthgov, Unitology, S.C.A.F., and Alien Circuit Sets:
Collect ALL of the specific set of artifacts.

Unlock Engineering Suit:
Beat the game on any difficulty setting.

Unlock Flight Suit:
Collect ALL 40 artifacts.

Unlock Hostile Enviornment Suit:
Finish ALL 10 optional missions in Co-Op mode.

Unlock Mega Resources Deposit:
Beat Pure Survival mode in New Game+.

Unlock Mk-II Overclock Parts Set:
Beat Pure Survival mode in New Game+.

Unlock Mk-II Overclocked Attachment Set:
Collect ALL 61 Circuits.

Unlock MK-II Overclocked Frame Set:
Complete ALL 10 optional missions.

Unlock MK-II Overclocked Module Set:
Collect ALL 71 logs.

Unlock Mk-II Overclocked Tip Set & Flight Suit:
Collect ALL 40 artifacts.

Unlock Research Circuit Set:
Collect ALL 35 Text Logs.

Unlock Retro Mode:
Beat Hardcore mode in New Game+.

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.

Pure Survival mode

Successfully complete the game. In this mode enemies will not drop health or ammunition, all items must be crafted at the bench, and the difficulty setting is locked to hard.

Retro mode

Successfully complete the game under the Hardcore mode setting. You can now toggle Retro mode from the "Options" menu to add a retro pixel filter to the graphics.

Save and Quit Item Exploit

When you activate the "Save and Quit" feature, the game will save a record of the items currently in your inventory and in the safe. If you do so after clearing out a room (but before triggering the next checkpoint), you can then load from your last auto-save and you will be able to clear the same room again, even though the available items will have already made it to your inventory. In this manner, you can collect those same items repeatedly. This trick can be exploited as often as you like in certain locations throughout the game, including near the first usable bench in Chapter 3, and then in the same room later in Chapter 4.

Secret Trophies

Complete the following tasks to unlock PlayStation 3 trophy rewards.

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

Various Trophies

Complete the following tasks to unlock PlayStation 3 trophy rewards.

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