Full list of all 58 Dead Space 2 achievements worth 1,250 gamerscore. It takes around 20-25 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 8 achievements worth 250 Gamerscore.
Complete the game on Hard Core setting
Decompress 20 Necromorphs without getting sucked out yourself
Complete the game on Zealot setting
Dismember 2,500 Necromorph Limbs (single player only)
Simultaneously have four completely upgraded weapons
Complete the game on any difficulty setting
Escape the Facility
Destroy the Marker
Survive the Eye Poke Machine
Kill 30 Crawlers without detonating them
Complete the Drill Ride
Collect 100 logs
Kill 30 Necromorphs with Kinesis objects
Purchase the Advanced Suit
Snare the Shard with the Ishimura
Kill 50 Necromorphs while they are in Stasis (single player only)
Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)
Upgrade 1 Weapon completely
Destroy the Tripod Nest
Kill 25 crawling enemies with Stomp (single player only)
Collect 10 Semiconductors
Upgrade your RIG and Stasis completely
Kill a Necromorph with every Weapon in the game (single player only).
Kill 20 enemies with Detonator Mines in a deployed state
Collect 10 Schematics
Complete the Solar Array Puzzle
Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)
Find the Peng treasure
Defeat the AI
Knock off every Tripod during the Elevator Sequence
Kill a Brute without taking damage
Win the fight at the School
Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)
Kill a Stalker with the Seeker Rifle while in Zoom Mode
Kill a Cyst by catching its Mine and throwing it back
Kill the Tormenter
Impale an enemy and make him fly through the air for 17 meters - it must stick to the surface
Kill 4 enemies with the same Ripper blade
Knock down an enemy with Contact Beam Alt-Fire then kill it with Primary Fire before it stands up
Survive your first encounter with Stalkers
Kill 50 enemies using the Flamethrower
Use Quick Heal ten times (single player only)
Stomp 10 Containers
Get through the first Zero-G area
Impale an enemy into a Decompression Window to cause it to blow out
Dismember the Lightspeed Boy Statue
Survive the Train Sequence
Get your first Suit
Dismember 25 Necromorph Limbs (single player only)
TK Impale a live Slasher to a surface using a Slasher's arm - it must stick to the surface
Severed: Complete Chapter 2
Severed: Complete on Zealot difficulty
Severed: Kill 16 or more enemies in the final last stand combat sequence
Severed: Find the Peng treasure in Severed
Severed: Complete Chapter 1
Severed: Take out the gunship within 30 seconds
Severed: Defend the quarry platform until the door unlocks
Severed: In the grinder room, cause an enemy to die in the grinders