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