No missable achievements (plus 25 unknown)
Sign in with Steam or Xbox to track your progress, and:
Complete the Tutorial
Kill 100 Enemies
Open a Gate in Zombie level
Collect 25 Dog Tags
Kill 100 Zombie chickens
Beat Chapter 1
Order 10 items from HQ
Use one of each heavy weapon on a single mission
Destroy 10 Towers
Destroy 10 Tanks
Earn 200,000 Command Points
Beat Chapter 2
Use Airstrike to Kill 3 Enemies At Once
Get a full squad in Zombie level
Fully Upgrade Your Squad
Beat Chapter 3
Lose the first mission
Lose 5 Troopers to Mines
Kill 50 Enemies with Grenades
Kill 50 Enemies with Rockets
Revive fallen squad members 10 times in Zombie level
Kill 50 Enemies with Machine Gunner
Kill 50 Enemies with Airstrike
Kill 50 Enemies with Delta Force
Collect 10 Medicrates in Zombie level