You died.
Cleared Onslaught Mode on any scenario and difficulty.
Defeated an Enforcer.
Defeated a Brute
Defeated a Reptile.
Cleared a Campaign scenario on Normal Difficulty or Higher.
Cleared a Campaign scenario on Biohazard Difficulty or Higher.
Cleared a Campaign scenario on Nightmare Difficulty.
Cleared a Campaign Scenario on Easy Difficulty or Higher.
Defeated a Zombie.