Full Gameplay Walkthrough...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
"Not Today"	Use a Revive Kit.
"Pills Here!"	Use 100 Health Stations.
Anger Management	Kill 500 Berserkers.
Benched	Kill 500 Lookouts.
Combat Medic	Heal a Teammate.
Command Collapse	Kill 500 Squad Leaders.
Dead-On Delivery	Use 100 Dead Drop Lockers.
Four In, Four Out	Extract with all four players alive.
Free Willie	Draw on the planning screen.
Giant Slayer	Kill 500 Heavies.
Graduation	Complete the training level.
Grunt Work	Kill 500 Soldiers.
Ironman	Complete Campaign with No Downs, No revives.
Mandatory Fun	Take a piece of pizza in the Office.
Mo' Money, Mo Problems	Save over $10,000 during a campaign.
Not Today	Use 100 Revive Stations.
Resupply Chain	Use hundred Ammo Caches.
Scavenger	Complete a Campaign without buying any Equipment.
Sharpshooter Season	Kill 500 Snipers.
Sidearm Only	Complete a Campaign using only Pistols.
Squad Goals	Start Campaign with a full party.
Stash and Grab	Use 100 Stash Rooms.
Swiss Army Gun	Fill five attachment slots on a weapon.
The Only Easy Day Was Yesterday	Complete your first campaign.