ALIENS: DARK DESCENT Full Gameplay...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Abysmal Horrors	Complete Mission 12.
Archivist	Gather all datapads.
Bandage Lover	Advance a Medic to level 10.
Call Me Snake	Kill an enemy before they detect the squad.
Chalk It Up To Experience	Have a marine with at least two Prostheses.
Cleaning Lethe, One Nest At A Time	During a campaign, kill hundred Xenomorphs.
Colonial Barrels	Kill an enemy by using an explosive barrel.
Come on, You Wanna Live Forever?	Advance a Sergeant to level 10.
Damn Dude, You Gotta Lose Some Weight!	Secure an unconscious marine.
Deep Into Insanity	Complete Mission 08.
El Riesgo Siempre Vive	Advance a Gunner to level 10.
Excavating The Truth	Complete Mission 11.
Fair And Square	Finish the game on Hard.
First Steps Into Madness	Complete Mission 02.
Flawless Victory	Keep all of your marines alive during a campaign.
Frontliner	Advance a Recon to level 10.
Hardened In The Heat Of Battle	During a campaign, advance each Marine Class to level 10.
Harper's Hell	Complete Mission 03.
Heavy Steps	Lure a Queen into a Mine.
Keep 'Em Coming	Kill every Alien of a Massive Onslaught.
Living Nightmare	Complete Mission 06.
Making a Stand	Complete Mission 04.
Omelette Du Fromage	Destroy four eggs with one grenade or an RPG shot.
One For Every Occasion	During a campaign, unlock every weapon.
People Person	During a campaign, secure five survivors.
Perfect Enhancements	During a campaign, unlock every Xeno Tech.
Perfect Organism	Finish the game on "No One Can Hear Them Scream" mode.
Recouped Investment	Have one Sentry kill at least ten aliens.
Regicide	Kill every Queen during a campaign.
Snatched Out	Prevent a marine from being Abducted.
Something Lurks Under The Hills	Complete Mission 01.
Stuff Of Nightmares	Save a Marine from being incubated.
The Cable Guy	Advance a Tecker to level 10.
The Darwin Era Was Here	Complete Mission 07.
The More The Merrier	Unlock the APC.
The Passenger	Complete Mission 09.
The Shrink Hates Me	Remove a Trait from a marine.
The Spire	Complete Mission 10.
The True Experience	In any mission, complete at least one objective with only one marine in the squad.
This Ain't No Picnic	Finish the game on Nightmare.
This Is Hayes, Pioneer Station, Signing Off	Finish the Prologue.
This Was No Papercut	Save a marine from dying of Bleeding.
This Went Smoothly	Finish the game on Medium.
Use The Bumper, That's What It's For	Make the ARC/APC run over an enemy.
Where It All Begun	Complete Mission 05.