[Dan]

Elite PMC - 50
Complete all missions as a Professional.

My Virtual Friend - 35
Complete all missions with the Partner AI.

Say Hello to my Little Friends - 45
Purchase the MP7, M134, DAO-X Protecta, MGL MK-X, and the M107 Light Fifty.

Man of Many Masks - 50
Purchase every mask variant.

If I Were a Rich Man - 40
Earn one million dollars in total over the course of campaign mode.

Fear is The Mind Killer - 45
Spend 1 minute straight at full Aggro.

Starting a Riot - 30
Kill 50 enemies total in Co-op Riot Shield.

Two Eyes are Better Than One - 35
Kill 5 enemies total using Co-op Snipe.

Seven-six-two Millimeter - 20
Kill 250 enemies total using Assault Rifles.

This is my Boom Stick! - 20
Kill 250 enemies total using Shotguns.

Spray and Pray - 20
Kill 250 enemies total using Machine Guns.

Dead Man's Hand - 20
Kill 150 enemies total using Handguns.

Alright, Who Wants Some? - 20
Kill 250 enemies total using SMGs.

One Shot. One Kill. - 20
Kill 100 enemies total using Sniper Rifles.

Big Boom! Big Bada Boom! - 20
Kill 25 enemies total using RPGs.

Flip You. Flip You For Real - 20
Kill 50 enemies total using the Melee Attack.

Fission Mailed - 20
Kill 25 Martyrs by shooting the Bomb Packs on their chests.

If It Bleeds, We Can Kill It - 30
Kill 25 Heavy Armor enemies.

Field Medic - 30
Drag and heal your partner 25 times.

Boots on the Ground - 10
Finish playing a versus ranked match.

The Devil's in the Details - 20
Complete 20 minor objectives in a ranked match.

Surviving The Game - 25
Complete a ranked match without ever needing to be revived.

Retirement Savings Plan - 40
Earn one billion dollars in total in ranked matches.

Out of Debt - 15
Heal your partner for the first time. Training does not count.

One Gun is Enough - 35
Win a ranked match without purchasing any additional weapons.

Beast with Two Fronts - 20
Kill 50 enemies total in Back-to-Back.

Running Man - 30
Kill 75 enemies while in the stealth mode of Overkill.

L'Abattoir - 30
Kill 100 enemies while in the power mode of Overkill.

Weapon Specialist - 15
Purchase 3 weapons.

Stonewall - 30
Kill 30 enemies using the Riot Shield melee attack

My Kind of Case! - 40
Collect all of the information cases in the entire game.

Secret Achievement - 30
Continue playing to unlock this secret achievement.

Secret Achievement - 30
Continue playing to unlock this secret achievement.

Secret Achievement - 15
Continue playing to unlock this secret achievement.

Secret Achievement - 15
Continue playing to unlock this secret achievement.

Secret Achievement - 15
Continue playing to unlock this secret achievement.

Secret Achievement - 15
Continue playing to unlock this secret achievement.

They sound pretty good.

Xbox360Achievements.org - ARMY OF TWO™ Achievement List