Purchase the Advanced Suit

Kill 20 enemies with Detonator Mines in a deployed state

Decompress 20 Necromorphs without getting sucked out yourself

Simultaneously have four completely upgraded weapons

Complete the game on any difficulty setting

Destroy the Marker

Survive the Eye Poke Machine

Kill 30 Crawlers without detonating them

Kill 50 Necromorphs while they are in Stasis (single player only)

Complete the Drill Ride

Collect 100 logs

Kill 30 Necromorphs with Kinesis objects

Snare the Shard with the Ishimura

Upgrade 1 Weapon completely

Upgrade your RIG and Stasis completely

Destroy the Tripod Nest

Kill 50 enemies using the Flamethrower

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

Kill a Stalker with the Seeker Rifle while in Zoom Mode

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

Complete the Solar Array Puzzle

Defeat the AI

Knock off every Tripod during the Elevator Sequence

Kill a Brute without taking damage

Win the fight at the School

Kill 4 enemies with the same Ripper blade

Kill a Cyst by catching its Mine and throwing it back

Kill the Tormenter

Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)

Survive your first encounter with Stalkers

Get through the first Zero-G area

TK Impale a live Slasher to a surface using a Slasher's arm - it must stick to the surface

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

Dismember the Lightspeed Boy Statue

Use Quick Heal ten times (single player only)

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

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

Kill 25 crawling enemies with Stomp (single player only)

Survive the Train Sequence

Stomp 10 Containers

Impale an enemy and make him fly through the air for 17 meters - it must stick to the surface

Get your first Suit

Dismember 25 Necromorph Limbs (single player only)