Dead Space 2 achievements

Kill a Necromorph with every Weapon in the game (single player only).

Impale an enemy into a Decompression Window to cause it to blow out

Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)

Kill 50 enemies using the Flamethrower

Knock down an enemy with Contact Beam Alt-Fire then kill it with Primary Fire before it stands up

Kill 30 Necromorphs with Kinesis objects

Kill 20 enemies with Detonator Mines in a deployed state

Kill a Stalker with the Seeker Rifle while in Zoom Mode

Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)

Kill a Cyst by catching its Mine and throwing it back

Kill 4 enemies with the same Ripper blade

Upgrade your RIG and Stasis completely