Dead Space 2 [cheats]
Successfully complete Dead Space: Ignition in single player Ignition mode to unlock the Hacker suit (has bonus perks and hacking capabilities), a Hacker-themed Contact Beam weapon skin, exclusive audio logs, and extra power nodes, health packs, and credits.
Refurbished Plasma Cutter
Have a saved game file from the original Dead Space. The Refurbished Plasma Cutter can be found at the first store.
Complete the indicated task to unlock the corresponding suit.
Arctic Security Suit: Complete the game under the Zealot difficulty to unlock it at the store
Elite Advanced Suit: Find the schematic in New Game + mode during Chapter 11. When the yellow lift reaches the top, turn around to find it on the ledge between the elevator and wall.
Elite Engineer Suit: Find the schematic in New Game + mode during Chapter 2, just before the first short outer space section.
Elite Riot Suit: Purchase at the store in New Game + mode.
Elite Security Suit: Find the schematic in New Game + mode during Chapter 9. After you exit the tram, search over the railing.
Elite Vintage Suit: Find the schematic in New Game + mode during Chapter 6. Search the area where you fight the tank before the end of the chapter.
Hacker Suit: Have a saved game file from Dead Space: Ignition to unlock it at the store.
Soldier Suit: Complete the game under the Hardcore difficulty to unlock it at the store.
Successfully complete the game under the Hardcore difficulty setting and upgrade the plasma pistol. The unlimited ammunition and one hit kill hand cannon can be found at the first shop. This weapon resembles a foam finger, and when fired Isaac makes "Bang Bang" and "Pew Pew Pew" sounds.
Successfully complete Campaign mode. This mode only allows you to restart from the last save game and only three save slots for the entire campaign will be available. You also cannot start this difficulty from the "New Game +" option.
New Game + mode
Successfully complete Campaign mode and save the game. This mode allows access to your all the weapons and items in the store and your inventory.
Extraction: Expert and Impossible difficulty
Successfully complete Chapter 10.
Reach the indicated level in your online career to unlock the corresponding upgrade.
Lurker Execution Attack Damage Increase: Level 27
Lurker Health Increase: Level 43
Lurker Melee Damage Increase: Level 15
Lurker Range Damage Increase: Level 3
Pack Execution Attack Damage Increase: Level 18
Pack Gets Out of Stasis Faster: Level 48
Pack Health Increase: Level 31
Pack Melee Damage Increase: Level 6
Puker Execution Attack Damage Increase: Level 24
Puker Health Increase: Level 58
Puker Melee Damage Increase: Level 39
Puker Ranged Damage Increase: Level 12
Spitter Execution Damage Increase: Level 9
Spitter Health Increase: Level 53
Spitter Melee Damage Increase: Level 21
Spitter Ranged Damage Increase: Level 35
Online level bonuses
Reach the indicated level online to unlock the corresponding bonus.
Solid Army Green Suit: Level 4
Stasis Increase to 2 Shots: Level 5
Line Gun: Level 7
Solid Red Suit: Level 8
Force Gun: Level 11
Solid Black Suit: Level 13
Increased Magazine Size (Plasma Cutter): Level 14
Solid Olive Suit: Level 16
Seeker Rifle: Level 17
Pulse Rifle Magazine Size Increase: Level 19
Urban Camo Blue Suit: Level 20
Urban Camo Army Green Suit: Level 23
Increased Magazine Size (Line Gun): Level 25
Urban Camo Red Suit: Level 26
Javelin Gun: Level 28
Increased Magazine Size (Force Gun): Level 29
Stasis Increase to 3 Shots: Level 30
Urban Camo Military: Level 32
Increased Magazine Size (Seeker Rifle): Level 33
Increased Weapon Damage (Plasma Cutter): Level 34
Urban Camo Olive Suit: Level 36
Pulse Rifle Weapon Damage Increase: Level 38
Rivet Gun Magazine Size Increase: Level 40
Tiger Camo Blue Suit: Level 41
Increased Weapon Damage (Line Gun): Level 42
Increased Magazine Size (Javelin Gun): Level 44
Tiger Camo Army Green Suit: Level 45
Increased Weapon Damage (Force Gun): Level 46
Tiger Camo Red Suit: Level 49
Increased Damage (Seeker Rifle): Level 50
Tiger Camo Military Suit: Level 52
Rivet Gun Weapon Damage Increase: Level 54
War Torn Suit: Level 56
Increased Weapon Damage (Javelin Gun): Level 57
Visceral Games Suit: Level 59
Additionally, you can unlock the Solid Viral White Suit or Urban Camo Viral Yellow Suit by killing a player that is wearing them.