Your squad is fully upgraded
Killed 3 enemies in an airstrike
Zombie - Reached wave 25
Completed the Special Ops Campaign
Both campaigns completed
Revived fallen squad members 10 times
Lost the first mission in either Campaign
Zombie - Killed 100 zombie chickens
Zombie - Got a full squad
Zombie - Reached wave 10
Completed the Soldier Campaign
Earned 1,000,000 Command Points
Completed the Tutorial