Here is the full list of all 51 Dead Space 2 (DE) trophies - there are 43 bronze, 4 silver, 3 gold and 1 platinum.
Earn all Trophies in Dead Space™ 2 - DE
Dismember 2,500 Necromorph Limbs (single player only)
Kill 30 Crawlers without detonating them
Decompress 20 Necromorphs without getting sucked out yourself
Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)
Kill a Stalker with the Seeker Rifle while in Zoom Mode
Kill 50 enemies using the Flamethrower
Impale an enemy into a Decompression Window to cause it to blow out
Kill a Necromorph with every Weapon in the game (single player only).
Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)
Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)
Knock down an enemy with Contact Beam Alt-Fire then kill it with Primary Fire before it stands up
Impale an enemy and make him fly through the air for 17 meters - it must stick to the surface
Kill 25 crawling enemies with Stomp (single player only)
Complete the game on Hard Core setting
Complete the game on any difficulty setting
Complete the game on Zealot setting
Escape the Facility
Destroy the Marker
Upgrade your RIG and Stasis completely
Simultaneously have four completely upgraded weapons
Upgrade 1 Weapon completely
Survive the Eye Poke Machine
Complete the Drill Ride
Purchase the Advanced Suit
Kill 50 Necromorphs while they are in Stasis (single player only)
Collect 100 logs
Snare the Shard with the Ishimura
Stomp 10 Containers
Destroy the Tripod Nest
Complete the Solar Array Puzzle
Collect 10 Semiconductors
Defeat the AI
Kill 20 enemies with Detonator Mines in a deployed state
Find the Peng treasure
Knock off every Tripod during the Elevator Sequence
Kill a Brute without taking damage
Win the fight at the School
Collect 10 Schematics
Kill a Cyst by catching its Mine and throwing it back
Kill the Tormenter
Kill 4 enemies with the same Ripper blade
Use Quick Heal ten times (single player only)
Survive your first encounter with Stalkers
Kill 30 Necromorphs with Kinesis objects
Get through the first Zero-G area
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