Have a saved game file from the original Dead Space to begin the game with access to the Plasma Cutter. However, your upgrades to the Plasma Cutter from Dead Space will not carry over.
Successfully complete the game on the Hardcore difficulty to unlock the Hand Cannon at the first shop in a New Game+. The Hand Cannon is a powerful weapon with unlimited ammunition, is a foam finger, and Isaac says "Bang Bang" and "Pew Pew Pew" when shooting it.
Successfully complete the game on any difficulty to unlock bonus elite suits in New Game+ mode. During a second playthrough, the Riot Armor Suit will be available in the store. The Elite Engineer Suit schematic can be found in Chapter 2 near the first store, just before the first short outer space section. The Elite Vintage Suit schematic can be found in Chapter 6 in the large hallway where Ellie and Stross are talking to you from the balcony and you are attacked by a Brute (it is next to a statue near the wall). The Elite Security Suit schematic can be found in Chapter 9 after exiting the tram with Ellie the first time; search over the railing to your right to find it on the floor. The Elite Advance Suit schematic can be found in Chapter 11 when the yellow lift that the Necromorphs jump onto reaches the top, turn around, and it is on the ledge between the elevator and wall.
Successfully complete the game on the Hardcore difficulty to unlock the Soldier Suit at the store. Successfully complete the game on the Zealot difficulty to unlock the Arctic Security Suit at the store.
Log into your same EA account through the Dead Space iOS game to unlock the Riot Armor Suit. This suit gives a weapon bonus to the Contact Beam of 10% extra damage and has 25 inventory slots and 25% armor.
Successfully complete the game on any difficulty to unlock New Game + mode. This mode allows you to start a second playthrough with all your weapons, items, and inventory from the previous game.
Successfully complete the game on any difficulty to unlock the Hardcore difficulty. This difficulty is equivalent to the Zealot difficulty, but only allows you to restart from the last saved game. It also only allows you to save three times during the entire campaign, and cannot be started from a New Game +.
At the start of Chapter 7, you will have the option to re-spec your weapons, RIG, and stasis module. This ability allows you to take out all the power nodes in a piece of equipment and re-assign them elsewhere. Each time you re-spec an item, it will cost 5000 CR. This ability does not help you get the achievement for upgrading all your equipment, but it is helpful to re-assign (or take back) power nodes from weapons you do not use anymore. Additionally, you can use this ability to refill Isaac's health at any workbench. If you re-spec the RIG, any changes to a health node will reset Isaac's health to the new maximum. For 5,000 credits, a re-spec is cheaper than a large medikit.
During the Drag Tripod encounter in the Church of Unitology, pause the game and restart from the checkpoint to skip the entire sequence and go straight to the Pack encounter.
Reach the indicated level in Multiplayer mode to unlock the corresponding bonus:
- Lurker Range Damage Increase: Level 3
- Solid Army Green Suit: Level 4
- Stasis Increase to 2 Shots: Level 5
- Pack Melee Damage Increase: Level 6
- Line Gun: Level 7
- Solid Red Suit: Level 8
- Spitter Execution Damage Increase: Level 9
- Force Gun: Level 11
- Puker Ranged Damage Increase: Level 12
- Solid Black Suit: Level 13
- Plasma Cutter Magazine Size Increase: Level 14
- Lurker Melee Damage Increase: Level 15
- Solid Olive Suit: Level 16
- Seeker Rifle: Level 17
- Pack Execution Attack Damage Increase: Level 18
- Pulse Rifle Magazine Size Increase: Level 19
- Urban Camo Blue Suit: Level 20
- Spitter Melee Damage Increase: Level 21
- Urban Camo Army Green Suit: Level 23
- Puker Execution Attack Damage Increase: Level 24
- Line Gun Magazine Size Increase: Level 25
- Urban Camo Red Suit: Level 26
- Lurker Execution Attack Damage Increase: Level 27
- Javelin Gun: Level 28
- Force Gun Magazine Size Increase: Level 29
- Stasis Increase to 3 Shots: Level 30
- Pack Health Increase: Level 31
- Urban Camo Military: Level 32
- Seeker Rifle Magazine Size Increase: Level 33
- Plasma Cutter Weapon Damage Increase: Level 34
- Spitter Ranged Damage Increase: Level 35
- Urban Camo Olive Suit: Level 36
- Pulse Rifle Weapon Damage Increase: Level 38
- Puker Melee Damage Increase: Level 39
- Rivet Gun Magazine Size Increase: Level 40
- Tiger Camo Blue Suit: Level 41
- Line Gun Weapon Damage Increase: Level 42
- Lurker Health Increase: Level 43
- Javelin Gun Magazine Size Increase: Level 44
- Tiger Camo Army Green Suit: Level 45
- Force Gun Weapon Damage Increase: Level 46
- Pack Gets Out of Stasis Faster: Level 48
- Tiger Camo Red Suit: Level 49
- Seeker Rifle Damage Increase: Level 50
- Tiger Camo Military Suit: Level 52
- Spitter Health Increase: Level 53
- Rivet Gun Weapon Damage Increase: Level 54
- War Torn Suit: Level 56
- Javelin Gun Weapon Damage Increase: Level 57
- Puker Health Increase: Level 58
- Visceral Games Suit: Level 59
- Solid Army Green Suit: Level 4
Additionally, you can unlock the Solid Viral Blue Suit, Solid Viral White Suit, Tiger Camo Viral White Suit, Urban Camo Viral Black Suit, and Urban Camo Viral Yellow Suit by killing a player that is wearing them. The Zealot Suit comes with the Collector's Edition of the game.
Search the indicated locations to find all schematics:
Power Node: It is in the first Power Node locked room you come across. You can open the locked door with a Power Node; you can find one on the ground through the door to the left of the closet.
Hacker Suit: It is at the end of the tram walkway area, near the spot you encounter the Fire Sack Necromorphs.
Stasis Pack: It is on the tracks by where the flaming train passes you for the first time.
Pulse Rifle: Once you are out of the train, it is in a corner just behind where the train is hanging.
Javalin Spears: It is behind the big marker statue towards the windows on the left.
Security Suit: It is on the top shelf of the room just past the door that you have to slow down to walk through.
Ripper: In the multi level room, ride the elevator down, then go to the right side of the room to find it.
Medium Health Pack: After you turn off the gravity and go through the holes in the ceiling, you will find it floating in the middle of the room.
Line Gun Ammo: After crawling through the duct and falling, you will go through a storage room. You will find it behind some shelves on the right side.
Detonator: It is in a room at the top of the church by the save station.
Seeker Rifle: On the path at the beginning of the chapter, take the door to the right. You will be on a balcony, and the schematic is on the far right side on the ground.
Pulse Rounds: When you first meet Ellie, she will unlock the gate. Instead of going through the gate behind her, follow the path around to the right where it is blocked by debris to find the schematic.
Flame Thrower: After you exit the gym, follow the path, and go into the classroom to find the "Kids Gone Crazy" text log. In that same room, there is a smaller room on the right side with blood on the wall. The schematic is on the ground.
Ripper Blades: At the start of the chapter when you enter zero gravity, the schematic will be floating at the bottom of the room.
Force Gun: After you exit the elevator, turn left, and you will come across yellow lockers. The schematic in the second locker from the left.
Contact Beam: The schematic is in the locked closet to the left of the spot where you first see the save station on the wall. Use a Power Node to open the closet and get the schematic.
Vintage Suit: The schematic is in the first locked door in this chapter.
Detonator Mines: When you first talk to Ellie and Stross, go to the next room, and take left. The schematic is beside a body.
Large Med Pack: The schematic is in the room where you first meet Ellie. It is past the table in the corner; you can move the table using your kinesis and grab it.
Flame Fuel: When you come across the laser traps, take a right from where they were. You will come across a few crates lying around; use your kinesis to move the crates and find the schematic along with an audio log.
Seeker Shells: The schematic is behind the guardian mounted near the exit door of the room where you fight Stalkers and Cysts.
Force Energy: When you reach the zero gravity area, go to the lower level to find the schematic on the ground.
Contact Energy: In the zero gravity station where you move the lasers to gain access to the shaft that leads inside, you will find the schematic if you look outside from the inside of the shaft.
Advanced Suit: Enter the locked room opposite of the detonator mines trap. The schematic is inside this room, but you need a Power Node to open this locked room.
Look around the following menu areas to find the following hidden messages:
- Upper left: "In the end, it all comes down to just one little thing..."
- Bottom right: "Unity after death, unity forever."
Single Player menu
- Upper left: "Your body now, our body later, one body forever"
- Upper middle: "It's not over between us, you can't run from me forever"
- Bottom middle: "Make us Whole"
Quick Match menu
- Bottom right: "We must believe in it and bend ourselves to its will and then it will heal us"
- Right: "The answer is in chicxulub"
- Left: "Welcome back Nicole Brennan"
Controller Map menu
- Bottom right: "Let us fear nothing. Death is only a transition to the unity beyond"
In Chapter 7 (approximately halfway through the level), find the mainframe room where ANTI is located. One of the circuit rooms will have breakers that turn blue in addition to being green or red (it is the left breaker room, if ANTI's hologram emitters are behind Isaac). Insert the four breakers in that circuit room so they are blue, and the access tunnel will now lead to a new room with the Peng treasure.
In Chapter 7, immediately after Isaac starts the elevator to go to the Solar Array area, a bunch of Tripods will appear. Use the Detonator to shoot them. Usually hitting a Tripod with the Detonator anywhere on the body will knock it off. Use Stasis to help hold a Tripod in place when more than one of them appears at a time. Knock off all Tripods in this sequence to get the "Elevator Action" achievement. If you do not get the achievement the first time, reload, and try again.
Once you exit the elevator and enter the shopping center area after the train scene in Chapter 3, you will see a large statue rotating. Shoot the head off of it with any weapon to get the "Lightspeed De Milo" achievement.