InsidiousWrath

Come Back To Me Kill a Sectoid who is currently mind controlling a squadmate

First Blood Complete the tactical tutorial

Another Glorious Day In The Corps Unlock all trophies.

Fair And Square Finish the game on Hard.

This Ain't No Picnic Finish the game on Nightmare.

Perfect Organism Finish the game on "No One Can Hear Them Scream" mode.

Chalk It Up To Experience Have a marine with at least 2 Prostheses.

The True Experience In any mission, complete at least one objective with only one marine in the squad.

This Went Smoothly Finish the game on Medium.

Flawless Victory Keep all of your marines alive during a campaign.

Abysmal Horrors Complete Mission 12.

Archivist Gather all datapads.
123/123

Excavating The Truth Complete Mission 11.

Regicide Kill every Queen 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.

Perfect Enhancements During a campaign, unlock every Xeno Tech.

Come on, You Wanna Live Forever? Advance a Sergeant to level 10.

Bandage Lover Advance a Medic to level 10.

The Spire Complete Mission 10.

The Passenger Complete Mission 09.

The Cable Guy Advance a Tecker to level 10.

Deep Into Insanity Complete Mission 08.

Heavy Steps Lure a Queen into a Mine.

One For Every Occasion During a campaign, unlock every weapons.

El Riesgo Siempre Vive Advance a Gunner to level 10.

Demonic Dispute Kill 100 enemies with your Demonology skills.
100/100

The Darwin Era Was Here Complete Mission 07.

Living Nightmare Complete Mission 06.

The More The Merrier Unlock the APC.

Halls of His Temple Enter Elohim's temple.

Logic check... OK Pass the initial checks.

Where It All Begun Complete Mission 05.

Making a Stand Complete Mission 04.

Recouped Investment Have one Sentry kill at least 10 aliens.
10/10

Harper's Hell Complete Mission 03.

First Steps Into Madness Complete Mission 02.

The Shrink Hates Me Remove a Trait from a marine.

People Person During a campaign, secure 5 survivors.
5/5

Omelette Du Fromage Destroy 4 eggs with one grenade or an RPG shot.

Stuff Of Nightmares Save a Marine from being incubated.

Colonial Barrels Kill an enemy by using an explosive barrel.

Something Lurks Under The Hills Complete Mission 01.

Damn Dude, You Gotta Lose Some Weight! Secure an unconscious marine.

Call Me Snake Kill an enemy before they detect the squad.

Use The Bumper, That's What It's For Make the ARC/APC run over an enemy.

Cleaning Lethe, One Nest At A Time During a campaign, kill 100 Xenomorphs.
100/100

This Was No Papercut Save a marine from dying of Bleeding.

Keep 'Em Coming Kill every Alien of a Massive Onslaught.

Snatched Out Prevent a marine from being Abducted.